From Wiktionary, the free dictionary
absense
- Misspelling of absence.
2005 April 16, ilya_sha...@yahoo.com, “Freedom is absense of fear”, in rec.arts.poems[1] (Usenet):
2006 July 3, IanW, “Strange absense of symptoms”, in uk.people.support.cfs-me[2] (Usenet):However, yesterday, I had an almost complete absense of symptoms.
2011 January 10, Raymond Karczewski, “Darkness Is The Absense Of Light Just As Evil is The Absense Of God”, in alt.politics.reform[3] (Usenet):