Submitted by Anonymous (not verified) on Thu, 05/09/2019 - 05:46 Lemma: trepanNgram Count: 1Starts with letter: YesIndefinite Article: aGoogle Ngram Count: 10115Sense count: 0Contained in other ngrams: 0Hierarchy: Past ParticipleForms: trepanningtrepansIssue: 0Forms Count: 2