ration</code></td><td><code><a href="https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#duration">google.protobuf.Duration</a></code></td><td><p>The amount of time allocated quota remains valid before it is automatically released. This is only meaningful for rate limit quotas. value should be 0 &lt; valid_duration</p></td></tr><tr id="Params.Quota.bucket_duration"><td><code>bucketDuration</code></td><td><code><a href="https://developers.google.com/protocol-buffers/docs/reference/g