Complex sentence: It is possible that this is the origin of the phrase'saved by the bell'-however, this phrase has been used in boxing parlance since at least the 1800s, so this seems the less likely etymology.
Split into simpler sentences: It is possible that this is the origin of the phrase "saved by the bell". However, this phrase has been used in boxing parlance since at least the 1800s, so this seems the less likely etymology.