blend vs immixture

blend

noun
  • A word formed by combining two other words; a grammatical contamination, portmanteau word. 

  • A mixture of two or more things. 

verb
  • To be mingled or mixed. 

  • To mingle; to mix; to unite intimately; to pass or shade insensibly into each other. 

immixture

noun
  • The act, or the result of immixing 

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