在wordpress中限制父类别的子类别

I am displaying only 6 sub categories of a Parent Category, this is the code I am using

$taxonomy = 'category';
$param_type = 'category__in';
$cat_id = get_cat_ID('Makeup');
$term_args=array(
'orderby' => 'name',
'order' => 'ASC',
'child_of' => $cat_id,
'limit' => 6 );
$terms = get_terms($taxonomy,$term_args);

if ($terms) {
foreach( $terms as $term ) { ?>
<h4><?php echo $term->name;?></h4>

Here results are coming limit less.

Please help me

Solved. I limited the categories using 'number' => 6;