Count words and junk.

count-stuff.php

<?php
function count_wtd_words() {

	$posts = get_posts( array(
		'tag'              => 'write-the-docs',
		'posts_per_page'   => -1,
		'suppress_filters' => false,
		'post_status'      => 'publish',
	) );

	$count = 0;

	if ( $posts ) {
		foreach ( $posts as $post_obj ) {
			$count = $count + (int) str_word_count( $post_obj->post_content );
		}
	}

	return $count;
}