European chafer vs fig-eater

European chafer

noun
  • A beetle, Amphimallon majale, native to continental Europe, now an invasive species in North America. 

fig-eater

noun
  • A beetle (Cotinis mutabilis) which ranges from central Texas across the southwestern United States and Mexico. 

  • A bird (Sylvia hortensis) that feeds on figs and grapes, and that people eat as a delicacy. 

  • A large beetle (Cotinis nitida) which has elytra that are velvety green with pale borders, which ranges from eastern Canada to central Texas, and which in the southern United States destroys figs. 

How often have the words European chafer and fig-eater occurred in a corpus of books? (source: Google Ngram Viewer )