It will help one to count (6)
I believe the answer is:
repute
This might be a double definition.
'it will help one' is the first definition.
The definition suggests a singular noun which matches the answer.
'count' is the second definition.
The answer and definition can be both related to thinking as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'to' is the link.
Can you help me to learn more?
(Other definitions for repute that I've seen before include "Known character, standing" , "General impression given" , "credit" , "Generally held opinion" , "State of high regard" .)