conditioning vs slimnastics

conditioning

noun
  • Any preparation or training, especially athletic training of the body. 

  • The process of modifying a person or animal's behaviour. 

  • The storage of a material specimen under specified temperature, humidity for a specified time prior to testing. 

slimnastics

noun
  • A form of athletic exercise intended to promote weight loss. 

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