halm vs haulm

halm

haulm

noun
  • The stems of various cultivated plants, left after harvesting the crop, which are used as animal food or litter, or for thatching. 

  • Part of a harness; a hame. 

  • An individual plant stem. 

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