Most of my contemporaries, male or female, at the local tech or secondaries, were probably far more likely to receive in-class slipperings than us, but trips for them to the Head for caning per capita were only slightly higher than us. I’m having to recall conversations over 40 years ago, but I’d suspect the figures were an average of 15-18 canings a year from 600 pupils, so that’s still only a 3% chance of getting caned.
Incidentally, all the secondary moderns were mixed, and only some caned girls as well. Again, a rough guess, boys got it about 3 times as much as girls at such places, so Jenny would have had around the same chance as me at MGS.