den vs put up

den

verb
  • To ensconce or hide oneself in (or as in) a den. 

noun
  • Synonym of fort (“structure improvised from furniture, etc. for playing games.”) 

  • A comfortable room not used for formal entertaining. 

  • A group of Cub Scouts of the same age who work on projects together. 

  • A small cavern or hollow place in the side of a hill, or among rocks; especially, a cave used by a wild animal for shelter or concealment. 

  • A squalid or wretched place; a haunt. 

put up

verb
  • To house; to shelter; to take in. 

  • To set (matter) in capital letters. 

  • To hang; to mount. 

  • To score; to accumulate scoring. Ellipsis of to put up on the scoreboard.. 

  • To style (the hair) up on the head, instead of letting it hang down. 

  • To cause (wild game) to break cover. 

  • To present, especially in "put up a fight". 

  • To cajole or dare (someone) to do (something). 

  • To build a structure. 

  • To provide funds in advance. 

  • To store away. 

  • To can (food) domestically; to preserve (meat, fruit or vegetables) by sterilizing and storing in a bottle, jar or can. 

  • To place in a high location. 

  • To make available; to offer. 

  • To endure; to put up with; to tolerate. 

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