The Brazilian has been subbed in 17 of the 20 league games he's started, according to this story at Statbunker.com.
The site also reveals that Petrov is one of only ten players who have started every Premiership game this season.
Statbunker supplies player stats exclusively to the Telegraph and has data going back to the 98/99 season.
Its Know The Game section has a selection of unique tables, one of which reveals that Robbie Fowler is our second highest goalscorer since 1998.
Another section lists City players by time spent at the club. Surprisingly, it shows that Nedum Onuoha is our third longest-serving player, despite only making his debut in November 2004.
Elsewhere, I notice that Benjani is currently 5th in the Actim Index, making him our highest ranked player. Another indicator of his worth can be found at this Portsmouth talkboard, where Benjani's work-rate is singled out for praise.