This is the 572nd most frequent Finnish word.
hehtaaria
"Hehtaaria" is the partitive singular form of "hehtaari," meaning "hectare," a unit of area equal to 10,000 square meters.
In this sentence, 'hehtaaria' (the partitive plural of 'hehtaari') is used to express the amount of land in hectares.
Taloni ympärillä on 10 hehtaaria peltoa.
There are 10 hectares of fields around my house.
Here, 'hehtaaria' is used in a partitive case to describe a large quantity, of which we refer to parts rather than a single unit.
Suomessa metsää on noin 26 miljoonaa hehtaaria.
In Finland, there are approximately 26 million hectares of forest.
In this example, 'hehtaaria' illustrates the measure of land area that is being added, emphasizing the act of acquiring by describing the amount.