The vocabulary of the Second Gospel embraces 1330 distinct words, of which 60 are proper names. Eighty words, exclusive of proper names, are not found elsewhere in the New Testament; this, however, is a small number in comparison with more than 250 peculiar words found in the Gospel of St. Luke. Of St. Mark’s words, 150 are shared only by the other two Synoptists;
http://www.newadvent.org/cathen/09674b.htm
The vocabulary of the Second Gospel embraces 1330 distinct words, of which 60 are proper names. Eighty words, exclusive of proper names, are not found elsewhere in the New Testament; this, however, is a small number in comparison with more than 250 peculiar words found in the Gospel of St. Luke. Of St. Mark’s words, 150 are shared only by the other two Synoptists;
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