agnate vs fatha

agnate

noun
  • Any paternal male relative. 

  • A relative whose relation is traced only through male members of the family. 

  • A statement having a similar meaning to another, but a different structure. 

adj
  • allied; akin 

  • Related to someone by male connections or on the paternal side of the family. 

  • Having a similar semantic meaning. 

fatha

noun
  • father 

  • The vowel designated by this mark. 

  • In Arabic script, the vowel point for a, appearing as a diagonal line placed above a letter ( ـَ ) and designating a short a /a/. If the Arabic letters ا (أَلِف (ʔalif)) or ى (أَلِف مَقْصُورَة (ʔalif maqṣūra)) immediately follow, it indicates a long ā /aː/. 

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