mongrel vs mulatto

mongrel

noun
  • Someone or something of mixed kind or uncertain origin, especially a dog. 

  • A thuggish, obnoxious, or contemptible person; (often preceded by "poor") a pitiable person. 

  • An erect penis; an erection. 

adj
  • Of mixed breed, nature, or origin; of or like a mongrel. 

mulatto

noun
  • A person of mixed black and white descent, especially a person with one black and one white parent or two mulatto parents. 

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