stock-in-trade
noun/ˌstɒk ɪn ˈtreɪd/
/ˌstɑːk ɪn ˈtreɪd/
[uncountable]- a person’s stock-in-trade is something that they do, say or use very often or too often
- Famous people and their private lives are the stock-in-trade of the popular newspapers.
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stock-in-trade