blend vs catena

blend

noun
  • A mixture of two or more things. 

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

verb
  • To be mingled or mixed. 

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

catena

noun
  • A series of related items. 

  • A series of distinct soils arrayed along a slope. 

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