Automattic\WP\Cron_Control\CLI\Events::calculate_interval PHP Method

    private function calculate_interval($since)
    {
        if ($since <= 0) {
            return 'now';
        }
        $since = absint($since);
        // array of time period chunks
        $chunks = array(array(60 * 60 * 24 * 365, \_n_noop('%s year', '%s years')), array(60 * 60 * 24 * 30, \_n_noop('%s month', '%s months')), array(60 * 60 * 24 * 7, \_n_noop('%s week', '%s weeks')), array(60 * 60 * 24, \_n_noop('%s day', '%s days')), array(60 * 60, \_n_noop('%s hour', '%s hours')), array(60, \_n_noop('%s minute', '%s minutes')), array(1, \_n_noop('%s second', '%s seconds')));
        // we only want to output two chunks of time here, eg:
        // x years, xx months
        // x days, xx hours
        // so there's only two bits of calculation below:
        // step one: the first chunk
        for ($i = 0, $j = count($chunks); $i < $j; $i++) {
            $seconds = $chunks[$i][0];
            $name = $chunks[$i][1];
            // finding the biggest chunk (if the chunk fits, break)
            if (($count = floor($since / $seconds)) != 0) {
                break;
            }
        }
        // set output var
        $output = sprintf(\_n($name[0], $name[1], $count), $count);
        // step two: the second chunk
        if ($i + 1 < $j) {
            $seconds2 = $chunks[$i + 1][0];
            $name2 = $chunks[$i + 1][1];
            if (($count2 = floor(($since - $seconds * $count) / $seconds2)) != 0) {
                // add to output var
                $output .= ' ' . sprintf(\_n($name2[0], $name2[1], $count2), $count2);
            }
        }
        return $output;
    }