amalgam vs half-caste

amalgam

noun

  • A combination of different things. 

  • An alloy containing mercury. 

  • One of the ingredients in an alloy. 

half-caste

noun

  • A person of mixed racial descent. 

adj

  • Of mixed racial descent. 

How often have the words amalgam and half-caste occurred in a corpus of books? (source: Google Ngram Viewer )