from time to time

sometimes but not often

the right time ... on time

at the planned time; neither late nor early

save time

Spent less time

at times


By the time

used for saying what has already happened at the time that something else happens

in time

with enough time to spare; before the last moment

took so long

Long period of time to finish something

lose track of time

to be unaware of what time it is


taking a lot of or too much time

take your time

to not hurry

spend time

Using period of time for doing something

At that time/in those days

refers to a period of time a long time ago (a decade, a century etc.). It is more common to use it


refers to a specific occasion and refers to something you yourself did a long time ago.
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