black haw vs chittamwood

black haw

noun

  • Sideroxylon lanuginosum, also native to Mexico. 

  • Viburnum prunifolium. 

  • Viburnum rufidulum (rusty blackhaw). 

  • Viburnum lentago. 

chittamwood

noun

  • A North American tree (Sideroxylon lanuginosum); the wood of this tree 

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