strong vs unsound

strong

adj
  • Severe; very bad or intense. 

  • Highly stimulating to the senses. 

  • Having an offensive or intense odor or flavor. 

  • Having a high concentration of an essential or active ingredient. 

  • Having a specified number of people or units. 

  • Having a wide range of logical consequences; widely applicable. (Often contrasted with a weak statement which it implies.) 

  • Capable of producing great physical force. 

  • Inflecting in a different manner than the one called weak, such as Germanic verbs which change vowels. 

  • Determined; unyielding. 

  • Having a high alcoholic content. 

  • Not easily subdued or taken. 

  • Having wealth or resources. 

  • Impressive, good. 

  • That completely ionizes into anions and cations in a solution. 

  • Convincing. 

  • Having a lot of power. 

  • Capable of withstanding great physical force. 

adv
  • In a strong manner. 

unsound

adj
  • Infirm, diseased. 

  • Not whole, not solid, defective. 

  • Not good, unreliable. 

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