fess vs let out

fess

verb
  • To confess; to admit. 

adj
  • Of animals, bad-tempered, fierce. 

  • Lively; active; strong. 

  • Proud; conceited. 

noun
  • A horizontal band across the middle of the shield. 

let out

verb
  • To disclose. 

  • Of a school: to finish for the day or term, allowing the pupils to go home. 

  • To rent out. 

  • Of sound, to emit. 

  • To allow to operate at higher speed by adjusting controls. 

  • To release. 

  • To enlarge by adjusting one or more seams. 

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