briar vs clump

briar

noun
  • A pipe for smoking, made from the roots of that shrub. 

  • The white heath (Erica arborea), a thorny Mediterranean shrub. 

  • Any of many plants with thorny stems growing in dense clusters, such as many in the Rosa, Rubus, and Smilax genera. 

  • Anything sharp or unpleasant to the feelings. 

clump

noun
  • A small group of trees or plants. 

  • A thick group or bunch, especially of bushes or hair. 

  • A cluster or lump; an unshaped piece or mass. 

  • A dull thud. 

  • A thick addition to the sole of a shoe. 

  • The compressed clay of coal strata. 

verb
  • To gather in dense groups. 

  • To form clusters or lumps. 

  • To walk with heavy footfalls. 

  • To strike; to beat. 

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