ramsons vs wild leek

ramsons

noun
  • A wild relative of chives, Allium ursinum, having edible leaves and roots. 

wild leek

noun
  • A perennial wild onion native to eastern North America, Allium tricoccum, with a cluster of ovoid bulbs and large oblong elliptical leaves. 

  • A wild onion native to southern Europe and western Asia, cultivated and consequently naturalized in many other places, Allium ampeloprasum. 

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