cover up vs settle in

cover up

verb
  • To conceal or disguise. 

  • To clothe. 

  • To put covers over oneself in bed. 

settle in

verb
  • To get comfortable or established, as in a new place. 

  • Used other than figuratively or idiomatically: see settle, in. 

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