$pattern = (reement\s*PFPC\s*receives\s*fees\s*at\s*annual\s*rate\s*of\s*)(#.{0,3}#)(\s*\s*of\s*average\s*net\s*asset\s*value\s*of\s*outstanding\s*In\s*)
while ($data =~m/$pattern/gi)
{            	
		$counter_number_of_search+=1;
                
}	
if ($counter_number_of_search == 1)
{
	##### Do some operation ########
}
else
{
        #######   increase the margin to search #####
}