figment of one's imagination vs vista

figment of one's imagination

noun
  • A product of the imagination. 

vista

noun
  • A vision; a view presented to the mind in prospect or in retrospect by the imagination. 

  • A distant view or prospect, especially one seen through some opening, avenue or passage. 

  • A site offering such a view. 

verb
  • To make a vista or landscape of. 

How often have the words figment of one's imagination and vista occurred in a corpus of books? (source: Google Ngram Viewer )