compress vs flatten

compress

verb
  • To make smaller; to press or squeeze together, or to make something occupy a smaller space or volume. 

  • To abridge. 

  • To make digital information smaller by encoding it using fewer bits. 

  • To be pressed together or folded by compression into a more economic, easier format. 

  • To condense into a more economic, easier format. 

noun
  • A multiply folded piece of cloth, a pouch of ice etc., used to apply to a patient's skin, cover the dressing of wounds, and placed with the aid of a bandage to apply pressure on an injury. 

  • A machine for compressing. 

flatten

verb
  • To make something flat or flatter. 

  • To reduce (a data structure) to one that has fewer dimensions, e.g. a 2×2 array into a list of four elements. 

  • To press one's body tightly against a surface, such as a wall or floor, especially in order to avoid being seen or harmed. 

  • To knock down or lay low. 

  • To lower by a semitone. 

  • To combine (separate layers) into a single image. 

  • To be knocked down or laid low. 

  • To become flat or flatter; to plateau. 

  • To make vapid or insipid; to render stale. 

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