bearberry vs moron

bearberry

noun
  • Arbutus menziesii. 

  • Any of three dwarf shrubs of the genus Arctostaphylos, which principally grow in arctic and subarctic regions and bear edible berries. 

  • Arctostaphylos uva-ursi, the common bearberry. 

moron

noun
  • A stupid person; an idiot; a fool. 

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