blend vs intercross

blend

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

  • To be mingled or mixed. 

noun
  • A mixture of two or more things. 

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

intercross

verb
  • To cross back over one another 

  • To breed two strains having a common ancestry with one another 

noun
  • The act or product of intercrossing 

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