"estimation about" is a correct and usable phrase in written English.
You can use it when you wish to make an estimate or rough calculation about something. For example, "We made an estimation about the total cost of the project."
He is making an estimation about what the outcome might be of the policies that we are implementing.
This endless speculation and estimation about the lives of these people has become the stuff of culture".
Mr. Corbyn supported British membership in the bloc of 28 nations, and, by his estimation, about three-quarters of Labour Party supporters voted to remain.
Davey Alba, a senior technology reporter, said, by her own estimation, "about 90percentt" of eligible BuzzFeed employees supported the idea.
By Mr. Sehring's estimation, about 500 theaters are now willing to play films that are simultaneously made available on video-on-demand systems.
It is, by his estimation, about a 10th of what the community needs to build new housing and attract new residents and businesses.
In the case of USA forests, estimations yield about 11% of all forest located within 85 m of a road (Riitters and Wickham 2003).
I've long been used to making those estimations about Syrian-border crossings.
Contemporary Gross Domestic Product (GDP) measurements serve as basis for estimations about the productivity of the agriculture, industry and service sectors around the world.
The last chapter of this review paper contain some strategic lines of glass usage in industry and estimations about the future of glass development.
While the approach proved a reliable tool for investigating the potential of improvement for alternative interconnect technologies and rejecting design flaws, precise estimations about lifetime in the field are still challenging.
