Commentary for Avodah Zarah 17:19

Yose b. Rabbi counts how many years each kingship ruled. The Persians ruled for 34 years after the Temple was rebuilt. Greece than ruled 180, then Hasmoneans began to rule. They ruled 103 years and then Herod’s family ruled for 103 years. If we assume, as the sugya does, that the Roman rule began at the same time that the Greeks were expelled, then the Romans ruled 206 years, not 180!