There is! https://en.wikipedia.org/wiki/Survival_function https://en.wikipedia.org/wiki/Survival_function I understand this is what actuaries spend their days

There is! https://en.wikipedia.org/wiki/Survival_function https://en.wikipedia.org/wiki/Survival_function I understand this is what actuaries spend their days tabulating. (I am an engineer not an actuary but in the past I been involved in efforts to apply the same maths to asset aging. However your mileage varies massively with the quality of your data).