Meaning of the word "once a day" in English

What does "once a day" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

once a day

US /wʌns ə deɪ/
UK /wʌns ə deɪ/

Phrase

one time during each day

Example:
You should take this medicine once a day.
I try to exercise at least once a day.