which figure of speech is used in this text? in may 2014, when wildfires threatened parts of san diego…

which figure of speech is used in this text? in may 2014, when wildfires threatened parts of san diego county in california, firefighters worked around the clock in an effort to control the blaze. idiom simile
Answer
Brief Explanations:
An idiom is a phrase with a figurative meaning different from the literal one. "Around the clock" is an idiom meaning continuously without stopping. A simile is a comparison using "like" or "as", which is not present here.
Answer:
idiom