chaparral vs scrubland

chaparral

noun
  • The foliage of creosote bush, Larrea divaricata, when used as a medicinal herb. 

  • A region of shrubs, typically dry in the summer and rainy in the winter. The coast of the Mediterranean is such a region. 

scrubland

noun
  • A plant community characterized by scrub vegetation, consisting of low shrubs, mixed with grasses, herbs, and geophytes. 

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