Okay, I'm back. Out of the 113 King George
V nickels I checked the results are as follows: Only 28 (about 24.8%) have a rotation of about 4-5 degrees or more, up to roughly 12 degrees. The remainder have none or very little. Of the 28 rotated ones, 15 of them were at the 4-5 degree mark, and these were scattered fairly evenly throughout the run of 1922 - 1936, with most years getting none or one, except 1934 which had 5. That leaves 13 nickels which had a rotation of 6 degrees or more, which are as follows:
1922 -- 12 degrees
1924 -- 7 degrees
1927 -- 8 degrees
1930 -- 12 degrees
1934 -- 1 @ 8 degrees
3 @ 10 degrees
1 @ 11 degrees
1935 -- 7 degrees
1936 -- 3 @ 7 degrees
As you can see, 1934 seems to be a banner year for rotations, at least as far as I've found, followed by 1936. So is it a common thing? IMO I would say yes, especially in the later years, at least up to 10 degrees or so. However any nickels with rotations greater than 10 degrees don't seem to be all that common, say 2-3% of the total coinage.