How to hide price and discount text from WooCommerce subscription dropdown optio

I want to remove the word “for”, the pricing + discount sale and only display the subscription options like “Delivery every month” and “Delivery every 2 months,” etc.

Instead of this
Choose your frequency dropdown
– Every month for $11.25 (10% off)
– Every 2 months for $11.25 (10% off)
– Every 3 months for $11.25 (10% off)
– Every 4 months for $11.25 (10% off)
– Every 5 months for $11.25 (10% off)
– Every 6 months for $11.25 (10% off)

I need this
Choose your frequency dropdown
– Every month
– Every 2 months
– Every 3 months
– Every 4 months
– Every 5 months
– Every 6 months

My code. I can change the the string text but I cannot remove the pricing. That’s been my biggest challenge. Using regex is giving me a page error about unknown modifier. Error below:

function wc_subscriptions_custom_price_string( $price_string ) {
    // Replace 'every' with 'Delivery every'
    $new_price = str_replace('every', 'Delivery every', $price_string);

    // Use regex to remove everything from the dollar sign to the closing </option> tag
    $new_price = preg_replace('/(Every )(month|\d months)(.*?(<\/option>))/gm', "$1$2$4", $price_string);

    return $new_price;
}
add_filter( 'woocommerce_subscriptions_product_price_string', 'wc_subscriptions_custom_price_string' );
add_filter( 'woocommerce_subscription_price_string', 'wc_subscriptions_custom_price_string' );

Warning: preg_replace(): Unknown modifier 'g' in /Users/chrisbrennan/Local Sites/dgoods/app/public/wp-content/themes/bricks-child/functions.php on line 319

The page I need help with: [log in to see the link]