A frame can be of any size with the only condition it can fit in a block. A block
can only hold an integer number of frames, or in other words, a frame cannot
-be spawned accross two blocks, so there are some details you have to take into
+be spawned across two blocks, so there are some details you have to take into
account when choosing the frame_size. See "Mapping and use of the circular
buffer (ring)".