A team has finished a game with 1-5-6 runs-hits-errors line 24 times since 1897, most recently Montreal Expos on 11 July 1975. That is about one every 18,458 team-games.
Box score for the most recent one ↗
1-5-4 1-5-2 1-5-3 1-5-1 1-5-0 1-5-5 1-5-6 1-5-7 1-5-8 1-5-11 1-5-9 1-5-10 1-6-2
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes