let out vs tuck away

let out

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

  • To disclose. 

  • 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. 

tuck away

verb
  • To save or hoard (something); to hide (something) in a safe spot; to squirrel away. 

  • To be located in a remote, inaccessible or difficult-to-see spot. 

  • To eat a lot of (something). 

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