loess vs sediment

loess

noun
  • Any sediment, dominated by silt, of eolian (wind-blown) origin 

sediment

noun
  • A collection of small particles, particularly dirt, that precipitates from a river or other body of water. 

verb
  • To be deposited as a sediment. 

  • To deposit material as a sediment. 

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