Commentary Inf II 140

For the words duca, segnore, and maestro, as well as others, terms used by Dante for his guide, see Gmel.1966.1, pp. 59-60, offering the following accountancy of these: duca is used 19 times in Inferno and 17 times in Purgatorio; maestro, 34 times in Inferno, 17 in Purgatorio; signore, 8 times; poeta, 8 times in Inferno, 7 times in Purgatorio; savio, 6 times; padre, 10 times. See also Virgilio.