umpteenth, umteenth, umptieth(adj)
last in an indefinitely numerous series
Occurring in a relatively large but unspecified position in a sequence.
That's the umpteenth time I've had to tell him not to swear in front of the children.
The numerical value of umpteenth in Chaldean Numerology is: 1
The numerical value of umpteenth in Pythagorean Numerology is: 5