1. How long means how long, mainly used to ask questions about a period of time (such as three days, four weeks, etc.).
Example phrase:
How long have you been waiting?
How long have you been waiting?
How long did you spend on your homework?
How long did it take you to do your homework?
How long have you been in this game?
How long have you been in this business?
How long have you been in your present job?
How long have you been doing this job?
How long have you been living in this country?
How long have you lived in this country?
How long have you been employed at this job?
How long have you been employed in this job?
How long does the journey usually take?
How long does this journey usually take?
How long have they been at war?
How long have they been fighting?
How long can a human being go without sleep?
How long can a person live without sleeping?
How long have you lived around here?
How long have you lived in this area?
How long were you in the queue?
How long have you been in line?
How long he'll be able to do so is a moot point.
I don't know how long he can do this.
How long will it take you to knit up this pattern?
How long does it take you to finish weaving this pattern?
How long will it take her to swim the Channel?
How long did it take her to swim across the English Channel?
How long can you balance on one leg?
How long can you stand on one leg?
How long do you think this storm will last?
How long do you think this storm will last?
How long will the fine weather hold?
How long does good weather last?
How long have you been married?
How long have you been married?
How long does it take to qualify?
How long does it take to qualify?
2 how often means how often, and is mainly used to ask questions about adverbs of frequency or adverbials (such as once a week, etc.).
Example phrase:
How often do you use the bus?
How often do you take the bus?
How often do you go to church?
How often do you go to church for a service?
How often does he come here? —Once a month.
How often does he come (every)? Once a month.
How often do you go to the cinema?—once a week.
How often do you go to the movies? — once a week.
How often do you go to the theatre?
How often do you watch a play?
How often do you go riding?
How often do you ride a horse?
How often do you exercise?
How often do you exercise?
How often do you go swimming?
How often do you go swimming?
How often do you actually get a gift you really need?
How often will you receive a gift that you do need?
How often do you water these trees?
How often do you water these trees?
How often do you brush your teeth?
How often do you brush your teeth?
How often do the buses run?
How often do buses run?
3. How soon asks how long after doing something; how fast; Ask how long after something happens
It is common to ask questions about "in+ some time", which means "how much later", and to ask questions about the length of time between (from now) and some time in the future, the answer is usually in+ some time.
How soon will you arrive here?-I will arrive here in 3 hours.
How soon will you arrive? Within three hours.
How soon will you come back?
How often do you come back?
How soon can you come up with the money?
When (and how often) will you be able to come up with this money?
How soon can you get here?
When will you be here?
4. How far: How far is the distance; To what extent [range]
How far is it to your house from here?
How far is it from here to your home?
How far is it from here?
How far is it from here?
How far is it to Malcy?
How far is it from Marcy?
How far is it to the station?
How far is it to the station?
How far is the airport from here?
How far is the airport from here?
How far can you throw?
How far can you throw?
You lived to tell the tale this time but who knows how far you can push your luck.
You've narrowed the drain this time, but who knows how long your luck will last?
How far have you got with that report?
How's that report going?
How far can we trust him?
How far can we trust him?
How far is human nature determined by biology?
To what extent is human nature determined by its physiology?
It's still not clear how far the Russian parliament will go to implement its own plans
It is not clear what kind of extreme measures the Russian parliament will take in the implementation of its own plans
How far did the film tell the truth about Barnes Wallis?
How much truth is there in the story of Barnes Wallis told in the film?
How far will members have progressed towards harmonising their economies?
How much progress will member countries make in the process of harmonizing their economies?
How far gone are you?
How many months are you pregnant?
Oxford Advanced English-Chinese Dictionary
Instructions occasionally ask for time, too.