| OS | Man Page | Section | Hits |
|---|---|---|---|
| posix | usleep | 100000 | 2,950 |
| linux | usleep | 3 | 1,044 |
| freebsd | usleep | 3 | 907 |
| debian | usleep | 3 | 825 |
| opensolaris | usleep | 3c | 817 |
| php | usleep | 3 | 794 |
| mojave | usleep | 3 | 725 |
| sunos | usleep | 3c | 708 |
| suse | usleep | 3 | 695 |
| centos | usleep | 3 | 673 |
| osx | usleep | 3 | 670 |
| suse | usleep | 3p | 668 |
| bsd | usleep | 3 | 667 |
| redhat | usleep | 3 | 628 |
| hpux | usleep | 2 | 623 |
| netbsd | usleep | 3 | 592 |
| minix | usleep | 1 | 553 |
| posix | usleep | 3posix | 533 |
| xfree86 | usleep | 1 | 493 |
| v7 | usleep | 1 | 466 |
| plan9 | usleep | 1 | 463 |
| posix | usleep | 3 | 450 |
| centos | usleep | 3p | 443 |
| x11r4 | usleep | 1 | 443 |
| opendarwin | usleep | 1 | 421 |
| osf1 | usleep | 3 | 406 |
| posix | usleep | 3c | 374 |
| redhat | usleep | 1 | 303 |
| centos | usleep | 1 | 271 |
| centos | usleep_range | 9 | 244 |
| suse | usleep | 1 | 230 |
| debian | ggusleep | 3 | 225 |