Per the FAA (https://www.faa.gov/regulations_policies/advisory_circulars/index.cfm/go/document.information/documentID/22680 https://www.faa.gov/regulations_poli

Per the FAA (https://www.faa.gov/regulations_policies/advisory_circulars/index.cfm/go/document.information/documentID/22680 https://www.faa.gov/regulations_policies/advisory_circulars/...), the actual number for "Almost Certain to never happen" is no more than 1 loss of life per 10^9 flight hours. There's a real number behind that term, but not necessarily a stat that's accessible to the average news reader.