busman's holiday
noun
bus·man's holiday ˈbəs-mənz- 
: a holiday spent in following or observing the practice of one's usual occupation
Example Sentences
Recent Examples on the Web More like a busman's holiday: a tour of duty rather than a scenic tour. 
James Harbeck, The Week, 5 Mar. 2022
James Harbeck, The Week, 5 Mar. 2022 Word History
First Known Use
1893, in the meaning defined above
- Sargasso weed fish
- sargassos
- sargassum
- Sargassum crab
- sargassum fish
- sargassum pipefish
- sargassums
- sarge
- Sargent
- Sargent cypress
- Sargent juniper
- sargent's cypress
- sargent's juniper
- sarges
- sargo
- past masters
- past mistress
- past one's prime
- past participle
- past perfect
- past redemption
- past service
- past tense
- past the hour
- pasta