Number of expected CCSNe detections from the Monte Carlo simulation compared to the missing fraction. Red line: Total number of expected CCSN detections from the dataset over the survey period as a function of the missing fraction. Shaded red areas: 1σ and 2σ confidence areas for the total number of expected CCSN detections from the dataset over the survey period as a function of the missing fraction. Poissonian upper and lower limits due to small number statistics and the cumulative effect of other error sources are combined here. Dashed black: Number of real detected CCSNe in the survey.