get-term-depth.php

<?php
if ( ! function_exists( 'inspiry_get_term_depth' ) ) :
	/**
	 * Returns an integer value that tells the term depth in it's hierarchy
	 *
	 * @param $term_id
	 * @param $term_taxonomy
	 * @return int
	 */
	function inspiry_get_term_depth( $term_id, $term_taxonomy ) {
		$term_ancestors = get_ancestors( $term_id, $term_taxonomy );
		if ( $term_ancestors ) {
			return count( $term_ancestors );
		}
		return 0;
	}
endif;