angst vs tenseness

angst

noun
  • Emotional turmoil; painful sadness. 

  • A feeling of acute but vague anxiety or apprehension often accompanied by depression, especially philosophical anxiety. 

verb
  • To suffer angst; to fret. 

tenseness

noun
  • The characteristic of being tense. 

  • A particular vowel or consonant quality that is phonemically contrastive in many languages, including English. 

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