inconsequential vs unfrequent

inconsequential

adj
  • Having no consequence; not consequential; of little importance. 

  • Not logically following from the premises. 

noun
  • Something unimportant; something that does not matter. 

unfrequent

adj
  • Not frequent; not common; not happening often; infrequent. 

verb
  • To stop frequenting; cease to frequent. 

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