encircling vs strident

encircling

adj
  • enclosing, skirting 

noun
  • encirclement 

strident

adj
  • Vigorous; making strides 

  • Grating or obnoxious 

  • Loud; shrill, piercing, high-pitched; rough-sounding 

noun
  • One of a class of s-like fricatives produced by an airstream directed at the upper teeth. 

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