nonplussed vs unscrewed

nonplussed

adj
  • Unaffected, unfazed; unimpressed. 

  • Unsure how to act or respond; bewildered, perplexed. 

unscrewed

adj
  • Not having been screwed. 

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