| OS | Man Page | Section | Hits |
|---|---|---|---|
| opensolaris | re_syntax | 1t | 192 |
| opendarwin | re_syntax | n | 114 |
| hpux | re_syntax | 3tcl | 103 |
| centos | re_syntax | n | 99 |
| freebsd | re_syntax | 3tcl | 99 |
| debian | re_syntax | 3tcl | 93 |
| ultrix | re_syntax | 3tcl | 92 |
| osx | re_syntax | n | 87 |
| redhat | re_syntax | 3tcl | 79 |
| suse | re_syntax | n | 76 |
| redhat | re_syntax | n | 72 |
| mojave | re_syntax | ntcl | 66 |
| mojave | re_syntax | n | 55 |