This is the 9586th most frequent Russian word.
харькова
"Харькова" is the genitive case of "Харьков," meaning "of Kharkiv," a city in Ukraine.
Here, 'Харькова' is the genitive case of 'Харьков', referring to the city of Kharkov in the context of movement towards or association with the city.
Я посетил Харькова в прошлом году.
I visited Kharkov last year.
In this example, 'Харькова' is incorrectly used where 'Харькове' should be; correct usage requires the prepositional case for the location 'in Kharkov'.
Мы видели фотографии, снятые в Харькова.
We saw photos taken in Kharkov.
Here, 'Харькова' is used in the genitive case to denote possession, as in 'the history of Kharkov'.