understood:</para>
<itemizedlist>
- <listitem><para>usec, us</para></listitem>
+ <listitem><para>usec, us, µs</para></listitem>
<listitem><para>msec, ms</para></listitem>
<listitem><para>seconds, second, sec, s</para></listitem>
<listitem><para>minutes, minute, min, m</para></listitem>
1y 12month
55s500ms
300ms20s 5day</programlisting>
+
+ <para>One can use the <command>timespan</command> command of
+ <citerefentry><refentrytitle>systemd-analyze</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ to normalise a textual time span for testing and validation purposes.</para>
</refsect1>
<refsect1>