convenience vs foreshadow

convenience

verb
  • To make convenient 

noun
  • Any object that makes life more convenient; a helpful item. 

  • The quality of being convenient. 

  • A convenient time. 

foreshadow

verb
  • To presage, or suggest something in advance. 

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