Update DAMON design doc to explain about DAMOS apply intervals.

Signed-off-by: SeongJae Park <sj@kernel.org>
---
 Documentation/mm/damon/design.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst
index 18e9b42673f8..1f7e0586b5fa 100644
--- a/Documentation/mm/damon/design.rst
+++ b/Documentation/mm/damon/design.rst
@@ -259,7 +259,8 @@ works, DAMON provides a feature called Data Access Monitoring-based Operation
 Schemes (DAMOS).  It lets users specify their desired schemes at a high
 level.  For such specifications, DAMON starts monitoring, finds regions having
 the access pattern of interest, and applies the user-desired operation actions
-to the regions as soon as found.
+to the regions, for every user-specified time interval called
+``apply_interval``.
 
 
 .. _damon_design_damos_action:
-- 
2.25.1