\fBd <regexp>\fR (date) selects mails whose field Date: matches the regexp.
.TP
\fBb <regexp>\fR (body) selects mails whose body matches the
-regexp. This needs to read fully the original mboxes and can take a
-long time. Other conditions have to be fulfilled before the body is
-read though.
+regexp. This requires reading the original mboxes completely, which
+can be slow. Althout other conditions have to be fulfilled before
+checking the body ones, which may speed things up.
.SH "EXAMPLES"