Complex sentence: The frequency of the bus service has been increased a few times, due to the a cross border phenomenon of Malaysians staying in Bukit Indah Johor while working in Singapore, esp. in the Jurong Areas.
Split into simpler sentences: The frequency of the bus service has been increased a few times over the years. This is due to the a cross border phenomenon of Malaysians staying in Bukit Indah Johor while working in Singapore, esp. in the Jurong Areas.