Submitted by Anonymous (not verified) on Tue, 05/07/2019 - 08:19 Lemma: letterboxNgram Count: 1Starts with letter: YesGoogle Ngram Count: 4341Sense count: 5Contained in other ngrams: 0Hierarchy: PluralThird PersonSingularThird person singular simple presentPlural NounIssue: 0Forms Count: 0