The series was published weekly from May 24, 1988, to March 14, 1989. (See detail in The Modern Age section above.) The temporarily increased frequency of issues allowed "Action Comics" to further surpass the older "Detective Comics" in the number of individual issues published. It surpassed "Detective Comics" in the 1970s when that series was bimonthly for a number of years. This change lasted from issue #601 to issue #642. During this time, Superman appeared only in a two-page story per issue; he was still the only character to appear in every issue of the series.