cover up vs enrobe

cover up

verb
  • To clothe. 

  • To conceal or disguise. 

  • To put covers over oneself in bed. 

enrobe

verb
  • To coat or cover. 

  • To invest or adorn with a robe or vestment; to attire. 

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