Hourly limits for the “Russian” search type
For the “Russian” search type, additional hourly limits may be imposed that are calculated as percentages of the daily query limit. The limits may vary from hour to hour and are set individually for each Yandex.XML user.
The daily limit on the number of queries for a site is 1000. During each hour in the period from 7:00 to 19:00, no more than 5% of the queries for this limit can be sent (50 queries).
Even if there were no search queries sent from the account in the period from 0:00 to 7:00, no more than 50 queries can be sent during each hour from 7:00 to 19:00. In total, no more than 600 queries can be sent over this period.