add specific term to last 2 month posts (wordpress)

add_new_term.php

<?php


$args = array(
  'post_type' => 'cartoon',
  'post_status' => 'publish',
  'orderby' => 'date',
  'order' => 'DESC',

  // Using the date_query to filter posts from last 2 month
  'date_query' => array(
      array(
          'after' => '2 month ago'
      )
  ),
  'posts_per_page' => -1   
); 
$query = new WP_Query( $args );

$found_posts = $query->found_posts;

if ($found_posts > 0) {
  $posts = $query->posts;
  for ($i=0; $i < sizeof($posts); $i++) {
    wp_add_object_terms( $posts[$i]->ID, 'new', 'new_or_popular' );
  }
}