Without using any plugins if u want to show the number of words used in a page or post at the bottom, you can use the following code in function.php
function count_words( $content ) {
$stripped_content = strip_tags( $content );
$wordnum = str_word_count( $stripped_content );
$label = __( 'Number of Words', 'wordcount' );
$content .= sprintf( '<h2>%s:%s</h2>', $label, $wordnum );
return $content;
}
add_filter( 'the_content', 'count_words' );
Here is the result

