arch vs uncoil

arch

verb
  • To form into an arch shape. 

  • To cover with an arch or arches. 

adj
  • principal; primary 

  • knowing, clever, mischievous 

noun
  • An architectural element having the shape of an arch 

  • An inverted U shape. 

  • Any place covered by an arch; an archway. 

  • Curved part of the bottom of a foot. 

  • A natural arch-shaped opening in a rock mass. 

  • An arch-shaped arrangement of trapezoidal stones, designed to redistribute downward force outward. 

uncoil

verb
  • To unwind or untwist (something). 

  • To unwind or untwist oneself. 

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