Extracted num_events from n_occ
Extracted num_events from n_occ


Former-commit-id: 51f94fb0b4ca62f40157cffd2017ea79afaf8681 [formerly 51f94fb0b4ca62f40157cffd2017ea79afaf8681 [formerly 45b123e872e24b8d103a5aa387e260d6ca0aa7c3]]
Former-commit-id: a28bf39069bd908ed9c2fb7b49c76919632f136b
Former-commit-id: 5d9f5384620fcfedf8b9e3e9fde83eb5a5e1cbde
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine