1617 J. Minsheu Asseheaddiness, or blockishnesse.]
1845 Sept. 43 The mule has..the ass-headedness of the ass.
1905 J. S. Farmer & W. E. Henley 16/1 Assheadedness, folly.
2013 E. Frattaroli in S. Akhtar vii. 91 My father's intolerance of my ‘ass-headedness’.