consultancy
US /kənˈsʌl.tən.si/
UK /kənˈsʌl.tən.si/

1.
the business of giving expert advice to other professionals or businesses in a particular field
:
•
She works for a management consultancy firm.
•
The company offers IT consultancy services.
2.
a period of time during which expert advice is given
:
•
We had a productive consultancy session with the expert.
•
The client requested a follow-up consultancy next week.