下面是我最终如何解决这个问题的，并感谢Samuel指出了tax\\u查询，尽管这只是问题的一部分。我需要创建一个循环，我是这样做的：

$ones = get_terms( array(
    \'taxonomy\' => \'ONE\',
    \'hide_empty\' => false,
    \'fields\' => \'id=>slug\' 
) );

$fruits = get_terms( array(
    \'taxonomy\' => \'FRUIT\',
    \'hide_empty\' => false,
    \'fields\' => \'id=>slug\' 
) );


foreach ($fruits as $fruit) {

foreach ($ones as $one) {

$args = array(
    \'post_type\' => \'my-post-type\',
 \'post_status\'=>\'publish\',
    \'tax_query\' => array(
        \'relation\' => \'AND\',
        array(
            \'taxonomy\' => \'ONE\',
            \'field\'    => \'slug\',
            \'terms\'    => array( $one ),
        ),
        array(
            \'taxonomy\' => \'FRUIT\',
            \'field\'    => \'slug\',
            \'terms\'    => array( $fruit ),
        ),
    ),
);
$query = new WP_Query( $args );

echo $fruit .": " . $one . ": " . $query->post_count . "<br>";

}
}