baleen whale vs sperm whale

baleen whale

noun
  • Any of several large whales, of the suborder Mysticeti, that have plates of whalebone instead of teeth 

sperm whale

noun
  • A whale (Physeter catodon, syn. Physeter macrocephalus), the largest of the toothed whales. 

  • Any whale in the superfamily Physeteroidea, which also includes the small whales of genus Kogia. 

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