half-caste vs miscegenation

half-caste

noun

  • A person of mixed racial descent. 

adj

  • Of mixed racial descent. 

miscegenation

noun

  • The mixing or blending of race in marriage or breeding, interracial marriage. 

  • A mixing or blending, especially one which is considered to be inappropriate. 

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