The characteristics of a simple subjects is that is has a subject and a verb.
First conditional .
It’s used to describe things that we think are likely to happen in the future
The new romantic capers of the knights of the time led to the popularity of romances in the Medieval period.
The answer would be - slang words and phrases. American and British English often differ greatly in such words as: highway (AmE) = motorway (BrE), or cookie (AmE) = biscuit (BrE), or diaper (AmE) = nappy (BrE), etc.
The answer you seek is “the practice of having two or more husbands”
