a / every hour

Takahero

Senior Member
Hello.
what is the difference between "a" and "every"?

a.The bus comes once "an" hour.
b.The bus comes once "every" hours.

Thank you.

• Rover_KE

Senior Member
b. is incorrect. 'The bus comes every hour' or 'The bus comes once every hour'.

They both mean the same as a.

ain'ttranslationfun?

Senior Member
I think "once an hour" can mean "once in every 60-minute period", while "every hour" can mean "at 60-minute intervals". But for a timetable, "once an hour" is understood to mean "at 2:10/2:25, 3:10/3:25...(etc)". Rover was referring to the use of 'every' with 'hour'. Note, however, that we can say "every two hours", etc.

PaulQ

Banned
Hello.
what is the difference between "a" and "every"?

a.The bus comes once "an" hour.
b.The bus comes once "every" hours.
The difference between "a" and "every" is best demonstrated in

A: "I had five apples in that bowl, and you have eaten an apple." -> a = one
and
A: "I had five apples in that bowl, and you have eaten every apple." -> every apple = each apple/all apples

a.The bus comes once "an" hour. -> in one hour
b.The bus comes once "every" hour. -> each hour/during all hours

Last edited:

Language Hound

Senior Member
But for a timetable, "once an hour" is understood to mean "at 2:10/2:25, 3:10/3:25...(etc)".
This looks like twice an hour to me unless this is supposed to be the schedule for two different buses.

ain'ttranslationfun?

Senior Member
No, I was talking about two (randomly chosen) times an hour apart: "2:10, 3:10, 4:10..." and "2:25, 3:25, 4:25..." for any given bus or train.

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