OnCo holds nothing dated to 1916. That is a gap in what has been read into the corpus, not a claim that the year was quiet, and the year has a page so the gap can be seen rather than passed over.
No record in OnCo carries a date in 1916. The corpus reads the field through its records, so an empty year means nothing has yet been read into it, and says nothing about what happened.
Years from 1900 onwards all have a page, empty or not, so that a gap in the reading is visible. The timeline shows which parts of the record are thin and why.
No record in OnCo carries a date in 1916. The year has a page so that the gap is visible rather than passed over: an empty year here means nothing has been read into the corpus for it, and says nothing about the year itself. The timeline shows which parts of the record are thin.