Some stats on an aarch64 binary of my current main project (1.6MB .text, 6600 symbols as per whatever "nm the-binary | wc -l" includes, from "objdump -d the-binary"):

    19546 /tbn?z/
    18029 /tbn?z.*, #0x0/  (but this includes boolean checks)
      224 /tbn?z.*, #0x1f/ (i.e. 32-bit x<0)
     1139 /tbn?z.*, #0x3f/ (i.e. 64-bit x<0)
      154 other immediates

Said project doesn't do fixed bitfields much (there are some, but a chunk of those test multiple bits) so unsurprisingly not much. (I could imagine that the kernel has significantly more, but it's an edge-case (though perhaps an important one) of being basically massive amounts of fixed configurable glue)