This is the 7002nd most frequent Polish word.
gubina
"Gubina" is not a Polish word or has no recognized meaning in Polish. It may be a typo or a proper noun.
In this context, 'gubina' is used as a colloquial term for a tiny or pocket-sized notebook.
Zagubiłem swoją gubinę w kolejce do lekarza.
I lost my tiny notebook while queuing for the doctor.
Here, 'gubina' refers to a creative or personal small notebook often used for sketches or personal thoughts.
W mojej gubinie przechowuję wszystkie moje szkice.
I keep all my sketches in my mini notebook.
In this usage, 'gubina' is a descriptive noun for a small, portable writing pad or device.