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diff --git a/share/man/man9/hardclock.9 b/share/man/man9/hardclock.9
--- a/share/man/man9/hardclock.9
+++ b/share/man/man9/hardclock.9
@@ -27,7 +27,7 @@
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd July 1, 2021
+.Dd February 27, 2023
.Dt HARDCLOCK 9
.Os
.Sh NAME
@@ -44,19 +44,18 @@
.Va hz
times per second on a very busy system, to twice a second on an idle system.
The
-.Va cnt
+.Fa cnt
argument reports an estimate of the number of ticks since the last call.
-The sum of
-.Va cnt
-over a second averages
-.Va hz
-over the long haul.
+Over long timescales, the average sum of
+.Fa cnt
+over one second is
+.Va hz .
See
.Xr hz 9
for important details over shorter time scales.
-The argument
-.Va usermode
-is none-zero when
+The
+.Fa usermode
+argument is non-zero when
.Fn hardclock
is called from an context that interrupted usermode execution.
.Pp
@@ -77,18 +76,23 @@
.Xr adjtime 2
induced changes and leap seconds, as well as any necessary
compensations to keep in sync with PPS signals or external clocks, if
-support for this is in the kernel (see
-.Xr options 4 ) .
+supported by the kernel.
.It
-Schedule softclock interrupts (
-.Xr swi 9 )
+Schedule softclock interrupts
+.Po
+.Xr swi 9
+.Pc
processing.
.It
Collect
.Xr hwpmc 4
statistics.
.It
-Do device polling, when enabled.
+Do device polling, when enabled
+.Po
+see
+.Xr polling 4
+.Pc .
.It
Implement software
.Xr watchdog 9
@@ -102,5 +106,11 @@
.Xr adjtime 2 ,
.Xr ntp_adjtime 2 ,
.Xr signal 3 ,
+.Xr hwpmc 4 ,
+.Xr polling 4 ,
.Xr ntpd 8 ,
-.Xr hz 9
+.Xr epoch 9 ,
+.Xr eventtimers 9 ,
+.Xr hz 9 ,
+.Xr swi 9 ,
+.Xr watchdog 9

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