What do you call...

[Sir Percy]

...a chamfer on the inside edge of a face frame, please?
The sort that doesn't go as far as the corners, but not 'stopped' (I think). Curves at ends.

Like this:

Next question is, how do go about making it? Is a drawknife required, and a chisel to finish at ends?

Thanks!

 

[custard]

A lambs tongue stopped chamfer is the Arts & Crafts real deal. In your photo it's a plain stopped chamfer, just stopping a 45 degree chamfer bit in a router will give you very nearly that look, a tiny bit of clean up with a chisel held bevel down if you want a cleaner finish.

 

[Sir Percy]

Thank you.

 

[monkeybiter]

Well I thought the type illustrated by the OP was a fortunate result of expediency in manufacturing, not having to work into the corners by hand, it's what I've done in my very humble efforts in the past.
I'd never heard of the lamb's tongue stopped chamfer, you can learn something new every day!