How frequently do drinks breaks occur in cricket?

Every hour they are having the drinks breaks.

test matches: every hour (1 per session for a total of 3 for the day).
1 day cricket: every 16-17 overs (2 per inning).

Every hour in Test cricket (one in the middle of each 2 hour session).

In OD l is generally two drinks breaks r taken, usually one after the 16th or 17th over is completed, another after 35 or 36 overs. However, the umpires may, at their discretion, call for drinks on more than two occasions, especially if the weather is hot & humid. The timing of the drinks breaks may also vary: if the ball is lost or a player is injured, time is lost anyway & so the umpires may call for drinks at this time, regardless of how many overs have been bowled or how much time there is left for lunch or tea.

every hour

usually every hour .. they take drinks break
hope it helped
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Every hour in Test cricket

1 per session every hour

unless the weather is extremely hot then 2 per session

think that u know it