You can use - function for this.

We will show how to display number of properties For Sale in the Offer Type as en example on the single property page

1. Visit Offer Type page and check a slug of the field (here: offer-type)

2. Hover For Sale to see its ID (here:117)

3. Now paste this PHP Code at the top of your /wp-content/themes/myhome/templates/single-estate-partials/content-single-estate.php file

<h1>Number of For Sale properties in the Offer Type:
$term = get_term( 117, 'offer-type' );
echo $term->count;

File will look like this:

It will look like this on your single property page. Now you can style it via CSS and change ID (117) or SLUG (offer-type) for any other