custom post type wordpress search

custom-search.php

<form role="search" method="post" class="search-form padding-1" action="<?php echo home_url( '/' ); ?>">
  <label>
    <span class="screen-reader-text"><?php echo _x( 'Search for:', 'label' ) ?></span>
    <input type="search" class="search-field" placeholder="<?php echo esc_attr_x( 'Search FAQs', 'placeholder' ) ?>" value="<?php echo get_search_query() ?>" name="s" title="<?php echo esc_attr_x( 'Search for:', 'label' ) ?>" />
    <input class="post_type" type="hidden" name="post_type" value="frequent" />
  </label>
  <input type="submit" class="search-submit button brand" id="searchsubmit" value="<?php echo esc_attr_x( 'Search', 'submit button' ) ?>" />
</form>


// Custom Search Results for FAQs
function template_chooser($template) {
	global $wp_query;   
	$post_type = get_query_var('post_type');   
	if( $wp_query->is_search && $post_type == 'frequent' ) {
		return locate_template('faq-search.php');  //  redirect to archive-search.php
	}   
	return $template;   
}
add_filter('template_include', 'template_chooser');