Kiekio
Kiekio is the genitive singular form of the Lithuanian noun kiekis, which means quantity, amount, or number of units. In Lithuanian, kiekio is used to indicate the quantity of something and to form noun phrases that describe measurements, inventories, or statistical data.
In practical usage, kiekio appears in phrases such as kiekio matavimas (measurement of quantity), kiekio kontrolė
Linguistic note: kiekis is the base noun, and kiekio is its genitive form. The concept corresponds to