Hello  Dear 
I evaluated your query in depth .
@ Recurring 
cough is usually related to allergic condition in majority of  
    cases .
@ Preventive measures with some controlling factors are going to give more
    better outcome as 
 # gargles with salted lukewarm water with added peppermint oil 3 
    times/day
 # ginger & turmeric are best ayurvedic herbs supportive 
 # avoid chilled beverages , spicy , oily , much sweet items, ice creams etc 
 # avoid exposure to excess 
cold / dusty environments , if needed use 
    face mask 
 # balanced nutritious diet to combat all possible pathogen invasions 
 # regular basis deep breathing exercises, 
YOGA for 30 minutes / day are
    tremendously going to cover many corners of the problem 
 # avoid 
smoking / alcohol / any abuse substances if used any 
Hope this will help you definitely to some extent .
Feel free to ask any further queries in future anytime .
Thanks for using Health care magic .
Regards .