convenience vs endeavor

convenience

verb
  • To make convenient 

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

  • The quality of being convenient. 

  • A convenient time. 

endeavor

verb
  • To work with purpose. 

  • To attempt through application of effort (to do something); to try strenuously. 

noun
  • A sincere attempt; a determined or assiduous effort towards a specific goal; assiduous or persistent activity. 

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