envisage vs expect

envisage

verb
  • To conceive or see something within one's mind; to imagine or envision. 

expect

verb
  • To predict or believe that something will happen 

  • To consider obligatory or required. 

  • To consider reasonably due. 

  • To be pregnant, to consider a baby due. 

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