+ const pv::util::SIPrefix prefix = view_.tick_prefix();
+ const pv::util::Timestamp diff = abs(second_->time() - first_->time());
+
+ const QString s1 = Ruler::format_time_with_distance(
+ diff, diff, prefix, view_.time_unit(), view_.tick_precision(), false);
+ const QString s2 = util::format_time_si(
+ 1 / diff, pv::util::SIPrefix::unspecified, 4, "Hz", false);