fetter vs put a monkey wrench in the works of

fetter

verb

To restrain or impede; to hamper.
To shackle or bind up with fetters.

noun

A chain or similar object used to bind a person or animal – often by its legs (usually in plural).
Anything that restricts or restrains.

put a monkey wrench in the works of

How often have the words fetter and put a monkey wrench in the works of occurred in a corpus of books? (source: Google Ngram Viewer )