It does totally depend, of course, on what fleet you end on. The ALMs on a certain (new) large grey 4-jet in Oxonia don't do 'dets' as such, but spend at least 33%of their time away, often nearer 50%. The difference from SH, though, is that the time is in shorter periods and often highly unpredictable and short-notice in nature.
As for the dummies...if she's like that now, you've got no chance
Time to shop for Ms Low Maintenance methinks