The race itself was much like its Greek counterpart, although there were usually 24 races every day that, during the fourth century, took place on 66 days each year. However, a race consisted of only 7 laps (and later 5 laps, so that there could be even more races per day), instead of the 12 laps of the Greek race. The Roman style was also more money-oriented; racers were professionals and there was widespread betting among spectators. There were four-horse chariots ("quadrigae") and two-horse chariots ("bigae"), but the four-horse races were more important. In rare cases, if a driver wanted to show off his skill, he could use up to 10 horses, although this was extremely impractical.