collectanea vs cumulation

collectanea

noun
  • A selective collection of passages from various sources or by various authors; an anthology. 

cumulation

noun
  • Accumulation. 

  • The effect of free trade agreements on the rules of origin in calculating importation tariffs, quotas, etc. 

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