How to customize "edit shipping address" in account page?

I could customized shipping address in “checkout field” following this tutorial.

https://docs.woothemes.com/document/tutorial-customising-checkout-fields-using-actions-and-filters/

I removed some field and added new fields in checkout field.

Now I want to customize shipping address in “Account page”.
If you go to Account page=>Addresses, you can edit billing address and shipping address. I want to make these same as checkout field.

I looked through website and found following snippet. I could unset and customize the field already exists, but I couldn’t find out how to add new fields.
Do anybody know how to do it?

add_filter( ‘woocommerce_billing_fields’, ‘custom_woocommerce_billing_fields’ );

function custom_woocommerce_billing_fields( $fields ) {

$fields[‘billing_first_name’] = array(
‘label’ => __(‘Name’, ‘woothemes’),
‘placeholder’ => __(‘Name’, ‘woothemes’),
‘required’ => true,
‘class’ => array(‘billing-first-name’)
);

$fields[‘billing_phone’] = array(
‘label’ => __(‘Phone’, ‘woothemes’),
‘placeholder’ => __(‘Phone’, ‘woothemes’),
‘required’ => false,
‘class’ => array(‘billing-phone’)
);

return $fields;
}

https://www.ads-software.com/plugins/woocommerce/