How to expand the length of a sub label so it doesn't wrap?

I looked up options such as:

.form-sub-label-container{

  white-space: normal;

}

but this didn't work

Please try to inject this custom CSS code to your form to target only that field: 

li#id_61 .form-sub-label {

    width: 500px !important;

}

To add a custom CSS code to your form, please follow this guide: 

https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes

I hope this helps. 

Here's the result:

Thank you!