forthcoming vs imminent

forthcoming

adj
  • Approaching or about to take place. 

  • Available when needed; in place, ready. 

  • Willing to co-operate or provide information; candid, frank, responsive. 

noun
  • Something that is yet to come. 

  • An act of coming forth. 

imminent

adj
  • about to happen, occur, or take place very soon, especially of something which won't last long. 

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