N4 — outside your level filter
数+個
Needs a numeral in front of it and takes no だ/です, so there are no forms to conjugate.
個
kocounter for small objectsN4counter
Example sentences2
りんごを三個買いました。
ringo o san ko kaimashita.
I bought three apples. neutral
それ、二個ちょうだい。
sore, ni ko choudai.
Give me two of those. casual