add_filter("asp_suggested_phrases", "asp_change_sugg_phrase_cond", 10, 2);
function asp_change_sugg_phrase_cond($phrases, $sid) {
// If the current post/page/cpt IDs is in this array
// then the alternative phrases are displayed.
// Change this to the post/page/cpt IDs you want
$cpt_array = array( 1, 2, 3 );
// The alternative phrases array. Add/remove keywords you want as alternatives.
// Change this to true if one of the pages is the home page as well
//-- Do NOT change anything below this line! --
if ( is_home() && !$allow_home) return $phrases;
if ( $post_id === false ) return $phrases;
if ( in_array($post_id, $cpt_array) ) return $alt_phrases;