insert_taxonomy_terms.php

<?php

function km_insert_taxonomy_terms_include_staff_on_page() {
    if ( ! term_exists( 'executive_committee', 'include_staff_on_page' ) ) {
        wp_insert_term( 'executive_committee', 'include_staff_on_page' );
    }
    if ( ! term_exists( 'our_people', 'include_staff_on_page' ) ) {
        wp_insert_term( 'our_people', 'include_staff_on_page' );
    }
    if ( ! term_exists( 'our_stories', 'include_staff_on_page' ) ) {
        wp_insert_term( 'our_stories', 'include_staff_on_page' );
    }
}
add_action( 'init', 'km_insert_taxonomy_terms_include_staff_on_page' ) );