extreme vs surd

extreme

noun
  • Either of the two numbers at the ends of a proportion, as 1 and 6 in 1:2=3:6. 

  • A drastic expedient. 

  • The greatest or utmost point, degree or condition. 

  • Each of the things at opposite ends of a range or scale. 

adj
  • Of a place, the most remote, farthest or outermost. 

  • Drastic, or of great severity. 

  • Of sports, difficult or dangerous; performed in a hazardous environment. 

  • Excessive, or far beyond the norm. 

  • In the greatest or highest degree; intense. 

surd

noun
  • An irrational number, especially one expressed using the √ symbol. 

  • A voiceless consonant. 

adj
  • unvoiced; voiceless 

  • Involving surds, or irrational numbers; not capable of being expressed in rational numbers. 

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