descend vs go to the bottom

descend

verb
  • To move toward the south, or to the southward. 

  • To fall in pitch; to pass from a higher to a lower tone. 

  • to proceed by generation or by transmission; to happen by inheritance. 

  • To go down upon or along; to pass from a higher to a lower part of 

  • to be derived (from) 

  • To pass from a higher to a lower place; to move downwards; to come or go down in any way, for example by falling, flowing, walking, climbing etc. 

  • To enter mentally; to retire. 

  • To come down, as from a source, original, or stock 

  • To come down to a lower, less fortunate, humbler, less virtuous, or worse, state or rank; to lower or abase oneself 

  • To make an attack, or incursion, as if from a vantage ground; to come suddenly and with violence. 

  • And on the suitors let thy wrath descend. 

  • To pass from the more general or important to the specific or less important matters to be considered. 

go to the bottom

How often have the words descend and go to the bottom occurred in a corpus of books? (source: Google Ngram Viewer )