This is the 18237th most frequent Russian word.
числу
"Числу" translates to "number" or "date" in the dative case in English.
The word 'числу' is used here as a dative form indicating a category or group.
Она принадлежит числу тех людей, которые всегда помогают другим.
She belongs to the number of those people who always help others.
In this context, 'числу' indicates a specific numerical value or parameter in dative.
Какому числу соответствуют эти данные?
What number do these data correspond to?
Here, 'числу' functions to specify an increased quantity of elements, stated in the dative case due to the verb usage.