aikaarvosta
Aikaarvosta is a term that appears in Finnish discussions about estimating how long a task will take. It is not a standard or widely recognized word in Finnish dictionaries, and its use is limited to informal contexts. The more common expression for the same idea is aika-arvio, meaning a time estimate.
The word seems to be a compound built from aika (time) and a form related to arvostus
In practice, aikaarvosta is rarely used in professional Finnish. Writers and speakers typically prefer aika-arvio or