Meaning of the word "at a time" in English

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

at a time

US /æt ə taɪm/
UK /æt ə taɪm/
"at a time" picture

Idiom

separately in the specified groups or numbers; during one individual period of time

Example:
Please go up the stairs two at a time.
He can only do one thing at a time.