Past time (two words): Refers to something that is overdue or should have happened already (e.g., “It’s past time to leave”) or a general time in the past.
Pass time (verb phrase): To spend time doing something, usually to occupy yourself or make time go by faster (e.g., “I read a book to pass time”)
Pass time is the phrase you were looking for.
Past time (two words): Refers to something that is overdue or should have happened already (e.g., “It’s past time to leave”) or a general time in the past.
Pass time (verb phrase): To spend time doing something, usually to occupy yourself or make time go by faster (e.g., “I read a book to pass time”)