scattering vs unfrequent

scattering

noun
  • The total number of votes awarded to nonmajor or unlisted candidates. 

  • The process whereby a beam of waves or particles is dispersed by collisions or similar interactions. 

  • A small quantity of something occurring at irregular intervals and dispersed at random points. 

unfrequent

verb
  • To stop frequenting; cease to frequent. 

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

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