dead calm vs splay

dead calm

adj
  • Completely still with no waves and no wind. 

noun
  • The condition of a perfectly flat sea with no waves and no wind. 

splay

adj
  • Flat and ungainly. 

  • Spread out; turned outward. 

verb
  • To dislocate, as a shoulder bone. 

  • To spread; spread out. 

  • To turn on one side; to render oblique; to slope or slant, as the side of a door, window, etc. 

  • To rearrange (a splay tree) so that a desired element is placed at the root. 

noun
  • A slope or bevel, especially of the sides of a door or window, by which the opening is made larger at one face of the wall than at the other, or larger at each of the faces than it is between them. 

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