What you are describing as 4p is not a "p", Mark. It's the Latin "-is" symbol. It's a loop with an ascender.
If you look closely at the Diplomatic ciphers, you will see that many of the letters have the "-is" symbol attached on the right-hand side. It looks vaguely like a "p" but not really once you get used to it.
The "-is" symbol can be attached to any letter, but only on the right-hand side. In manuscripts, it is never attached on the left.
In Latin, this is an "r" or an "i" with the "-is" symbol attached: m
And this is a "c" with an "-is" symbol attached: g
The loop + descender is the "-is" part.
So, if you want to search for that shape when it is attached to a q symbol, keep in mind that it is not a "p".
If you look closely at the Diplomatic ciphers, you will see that many of the letters have the "-is" symbol attached on the right-hand side. It looks vaguely like a "p" but not really once you get used to it.
The "-is" symbol can be attached to any letter, but only on the right-hand side. In manuscripts, it is never attached on the left.
In Latin, this is an "r" or an "i" with the "-is" symbol attached: m
And this is a "c" with an "-is" symbol attached: g
The loop + descender is the "-is" part.
So, if you want to search for that shape when it is attached to a q symbol, keep in mind that it is not a "p".