i cough many times a day. sometimes it's a dry cough from post nasal drip and other times it's productive.
My FEV1 is 98% so I'm not convinced there's a correlation between FEV1 and cough frequency. I do do all I can to keep my airways open aka do the Vest religiously, pulmozyme twice a day, HTS twice a day, and exercise (cardio). So I know I keep things moving.