perch vs plonk oneself down

perch

noun
  • Acanthopagrus berda 

  • Kyphosus azureus 

  • Any of the three species of spiny-finned freshwater fish in the genus Perca. 

  • A pole connecting the fore gear and hind gear of a spring carriage; a reach. 

  • Distichodus engycephalus, Distichodus rostratus 

  • A rod, staff, tree branch, ledge, etc., used as a roost by a bird. 

  • Lateolabrax japonicus, Tautogolabrus adspersus 

  • A position that is overly elevated or haughty. 

  • A cubic measure of stonework equal to 16.6 × 1.5 × 1 feet. 

  • A platform for lights to be directed at the stage. 

  • Johnius belangerii, Macquaria ambigua, Macquaria colonorum, Macquaria novemaculeata, Nemadactylus macropterus 

  • Several similar species in the order Perciformes, such as the grouper. 

  • A position that is secure and advantageous, especially one which is prominent or elevated. 

  • A frame used to examine cloth. 

  • A bar used to support a candle, especially in a church. 

verb
  • To sit upon the edge of something. 

  • To stay in an elevated position. 

  • To rest on a perch (especially, of a bird); to roost. 

  • To place something on (or as if on) a perch. 

  • To inspect cloth using a perch. 

plonk oneself down

How often have the words perch and plonk oneself down occurred in a corpus of books? (source: Google Ngram Viewer )