How to find the total number of formErrorContent for ID cardZip .
<div class="fieldCont">
<label for="cardZip" class="errdLabel">Billing Zip Code</label>
<input type="text" name="cardZip" id="cardZip" class="" maxlength="5">
<div class="formErrorContent">Billing Zip Code Required field<br></div>
<div class="formErrorContent">Billing Zip Code Required field<br></div>
</div>