Best credit card for business travel?

I'll be going on around three or four business trips a year, each trip should be about three to four weeks long. For air tickets, hotels and other overseas spending like dining and transport, which credit card is the best? Cashback or miles?

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Would also appreciate any other advice or tips related to business travel as I'm totally new to this, such as clocking in airline miles/hotel rewards?

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Thanks in advance!