| OS | Man Page | Section | Hits |
|---|---|---|---|
| freebsd | re | 4 | 398 |
| linux | re | 3erl | 286 |
| osf1 | re | 7 | 230 |
| debian | re | 4 | 226 |
| osx | re | 3pm | 225 |
| x11r4 | re | 1 | 225 |
| bsd | re | 1 | 218 |
| redhat | re | 3pm | 214 |
| opensolaris | re | 1 | 204 |
| posix | re | 1 | 199 |
| mojave | re | 3pm | 198 |
| netbsd | re | 4 | 196 |
| php | re | 1 | 192 |
| plan9 | re | 1 | 187 |
| suse | re | 3pm | 187 |
| opendarwin | re | 1 | 186 |
| centos | re | 3pm | 186 |
| minix | re | 1 | 185 |
| xfree86 | re | 1 | 185 |
| v7 | re | 1 | 183 |
| debian | re | 1 | 173 |
| hpux | re | 1 | 156 |
| debian | re | 3perl | 130 |