entering vs goodbye

entering

noun
  • action of the verb to enter 

goodbye

verb
  • To say goodbye; to wish somebody farewell on parting. 

noun
  • An utterance of goodbye, the wishing of farewell to someone. 

intj
  • Farewell; a formula used to another person or persons when the speaker, writer, or person addressed is departing. 

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