seasonable vs semelfactive

seasonable

adj

  • Opportune; occurring at an appropriate or suitable time. 

  • Appropriate to the current season of the year. 

semelfactive

adj

  • Of or relating to the semelfactive aspect. 

noun

  • The semelfactive aspect. 

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