I have difficulty in using time and times correctly.
I understand that times may be used for some idiomatic purposes such as "at all times" or "of all times" or "some times", although sometimes it will be in singular, as in "all the time".
My concern is not really about the meanings of the particular idioms in my examples. Instead, I want to know if there is any general rule that I may refer to when I am deciding whether to use time or times, for an idiom, nouns, or likewise.