spiceberry vs swamp holly

spiceberry

noun
  • Its fruit, a glossy, bright red drupe. 

  • A compact flowering plant, Ardisia crenata, native to East Asia. 

swamp holly

noun
  • American winterberry, Ilex verticillata. 

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