black alder winterberry vs false alder

black alder winterberry

noun

  • A deciduous holly shrub, Ilex verticillata, native to eastern North America, growing best in moist circumstances. 

false alder

noun

  • American winterberry, Ilex verticillata. 

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