awk --posix

       r{n}
       r{n,}
       r{n,m}    

One  or  two  numbers  inside  braces  denote an interval expression.  If there is one number in thebraces, the preceding regular expression r is repeated n times.  If there are two numbers  separated by  a  comma,  r  is  repeated  n to m times.  If there is one number followed by a comma, then r is repeated at least n times.

Interval expressions are only available if either --posix or --re-interval is specified on the  com-mand line.

 

 

 

[root@localhost ]# echo love-qq007-9w | awk '/love-qq[0-9][0-9][0-9]-[0-9]w/'
love-qq007-9w
[root@localhost ]# echo love-qq007-9w | awk  --posix '/love-qq[0-9]{3}-[0-9]w/'    
love-qq007-9w