This doesn't occur with any frequency, but there has been instances of AAMs being launched against targets on the ground or in
.
While AAM warheads are generally unsuitable for ground targets, the US Navy has actually
and probably some other AAMs an air-to-ground capability:
Not to say the PLAAF or PLAN has actually done it, but the USN is probably not alone in such efforts.
Something like the PL-17 isn't going to be suitable against most ground targets, but in a pinch, it might suffice against radars and other targets that don't require too much explosive power to effectively disable.
Moreover, if you think about it, some defense contractor or another is probably in the process of turning an AAM into a AGM as we speak because the form factor is compatible with a specific IWB.
Though whether or not such an AGM ever reaches service is going to be a whole other story.