| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | re | 3erl | 692 |
| freebsd | re | 4 | 655 |
| redhat | re | 3pm | 538 |
| osf1 | re | 7 | 497 |
| x11r4 | re | 1 | 494 |
| opensolaris | re | 1 | 490 |
| plan9 | re | 1 | 483 |
| posix | re | 1 | 474 |
| bsd | re | 1 | 472 |
| minix | re | 1 | 469 |
| osx | re | 3pm | 449 |
| opendarwin | re | 1 | 447 |
| mojave | re | 3pm | 443 |
| php | re | 1 | 435 |
| xfree86 | re | 1 | 428 |
| debian | re | 1 | 427 |
| debian | re | 4 | 425 |
| v7 | re | 1 | 417 |
| netbsd | re | 4 | 405 |
| hpux | re | 1 | 400 |
| centos | re | 3pm | 387 |
| suse | re | 3pm | 382 |
| debian | re | 3perl | 294 |