lector vs problematic

lector

noun
  • A public lecturer or reader at some universities. 

  • A person doing voice-over translation of foreign films, especially in Eastern European countries. 

  • A lay person who reads aloud certain religious texts in a church service. 

  • A person who reads aloud to workers to entertain them, appointed by a trade union. 

verb
  • To do a voice-over translation of a film. 

problematic

noun
  • A problem or difficulty in a particular field of study. 

adj
  • Difficult to overcome, solve, or decide. 

  • Contributing (especially if subtly) to discrimination (such as racism, sexism, homophobia, transphobia, or ageism). 

  • Not settled, uncertain, of uncertain outcome; debatable, questionable, open to doubt. 

  • a problematic analysis 

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