junk vs leaf litter

junk

noun
  • Discarded or waste material; rubbish, trash, garbage. 

  • A Chinese sailing vessel. 

  • The genitalia, especially of a male. 

  • A collection of miscellaneous items of little value. 

  • Any narcotic drug, especially heroin. 

  • Salt beef. 

  • Pieces of old cable or cordage, used for making gaskets, mats, swabs, etc., and when picked to pieces, forming oakum for filling the seams of ships. 

  • Nonsense; gibberish. 

  • Material or resources of a kind lacking commercial value. 

verb
  • To throw away. 

  • To find something for very little money (meaning derived from the term junkshop) 

leaf litter

noun
  • Dead plant material, such as fallen leaves, bark, and twigs, that has fallen to the ground and may be used by animals as habitat or for nest-building, eventually decomposing and releasing nutrients into the soil. 

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