decreasing pump times

Jamie
Looking for some advice to help decrease pumping times! 
I'm 6months in and currently doing 5 times a day. I have a prettty set schedule (6am, 10am, 2pm, 6pm, 10pm) and I'm hoping to get down to 3times a day (6am, 2pm, 10pm). 
Is it best to move the 10am and 6pm hour by hour until I get to solely 2pm and 10pm? Or should I just pump a little to relieve pressure and do longer pumps at 2pm and 10pm? 
Has anyone seen a decrease is overall supply when changing their pumping schedules? I'm also scared to get infections and clogged ducts ☹️