This is the 9314th most frequent Russian word.
строкина
The word "строкина" does not exist in Russian. It may be a misspelling or typo.
Here it is used to signify a specific line within written text.
На странице книги была строкина с интересным фактом.
There was a line on the page of the book with an interesting fact.
In this case, it refers to a line of code in a programming context.
Строкина программы выдавала ошибку.
The line of the program was producing an error.
Here, it refers to a line of poetry, emphasizing its artistic and emotional significance.