encircling vs skirting

encircling

noun
  • encirclement 

adj
  • enclosing, skirting 

skirting

noun
  • Skirting boards collectively. 

  • The act of one who skirts around something, or avoids it. 

  • skirts collectively; material for skirts 

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