fescue vs let in

fescue

verb
  • To use a fescue, or teach with a fescue. 

noun
  • An instrument for playing on the harp; a plectrum. 

  • The style of a sundial. 

  • A hardy grass commonly used to border golf fairways in temperate climates. Any member of the genus Festuca. 

  • A straw, wire, stick, etc., used chiefly to point out letters to children when learning to read. 

let in

verb
  • To associate with. 

  • To let someone or something come in; to admit someone or something in. 

  • To divulge one's inner thoughts to (someone), making oneself emotionally vulnerable to them; to open up to (someone). 

How often have the words fescue and let in occurred in a corpus of books? (source: Google Ngram Viewer )