loam vs old sod

loam

adj
  • Made of loam; consisting of loam. 

noun
  • A mixture of sand, clay, and other materials, used in making moulds for large castings, often without a pattern. 

  • A type of soil; an earthy mixture of sand, silt and clay, with organic matter to which its fertility is chiefly due. 

verb
  • To cover, smear, or fill with loam. 

old sod

noun
  • The old country; one's place of origin. 

  • Used other than figuratively or idiomatically: see old, sod (person). 

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