This is the 11471st most frequent Russian word.
документация
Documentation.
This usage refers to specific structured materials related to a project or task.
Проектная документация должна быть готова к следующей неделе.
The project documentation must be ready by next week.
Here, 'documentation' pertains to scholarly or academic materials.
Я занимаюсь изучением научной документации по этой теме.
I am studying scientific documentation on this topic.
In this sentence, 'documentation' indicates instructional or guideline materials provided in a professional context.