dad vs fatha

dad

noun
  • A father, a male parent. 

  • A lump or piece. 

  • A blow; act of striking something. 

  • Used to address an older adult male 

  • Used to address one's father 

verb
  • To throw against something; to dash. 

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 dad and fatha occurred in a corpus of books? (source: Google Ngram Viewer )