Sentence examples for how time from inspiring English sources

"how time" is not a correct or usable part of a sentence in written English.
It is not a grammatically complete phrase and does not make sense on its own. The context in which it is being used is unclear and it is not clear what it is supposed to convey. An example of how "how time" could be used in a sentence, although still not grammatically correct, would be: "How time flies when you're having fun!".