William took over an English government that was more complex than the Norman system. England was divided into shires or counties, which were further divided into either hundreds or wapentakes. Each shire was administered by a royal official called a sheriff, who roughly had the same status as a Norman viscount. A sheriff was responsible for royal justice and collecting royal revenue. To oversee his expanded domain, William was forced to travel even more than he had as duke. He crossed back and forth between the continent and England at least 19 times between 1067 and his death. William spent most of his time in England between the Battle of Hastings and 1072, and after that, he spent the majority of his time in Normandy. Government was still centred on William's household; when he was in one part of his realms, decisions would be made for other parts of his domains and transmitted through a communication system that made use of letters and other documents. William also appointed deputies who could make decisions while he was absent, especially if the absence was expected to be lengthy. Usually, this was a member of William's close family – frequently his half-brother Odo or his wife Matilda. Sometimes deputies were appointed to deal with specific issues.