contain vs unwrap

contain

verb
  • To include as a part. 

  • To put constraints upon; to restrain; to confine; to keep within bounds. 

  • To hold inside. 

  • To have as an element or subset. 

unwrap

verb
  • To open or undo, as what is wrapped or folded. 

  • To remove word wrap from. 

  • To become unwrapped. 

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