Many posters have shown how American, German, Russian engineers and mechanics were very adept at taking damaged and destroyed tanks and putting them back together for new crews. Since im assuming the rebuilt vehicles wouldn't be going to their old crews (since they would likely be given new tanks soon after), how many crews would an average tank see rotated through it?
Was there any country in particular you were wondering about? The differences in lost tanks and men between say the Russians and the Americans would make it hard to come to a conclusion.