add margin to border css code example

Example: how to add a word between borders css

fieldset {
  display: block;
  margin: 20px auto;
  padding: 15px;
  border: 0;
  border: 1px solid red;
  width: 50%;
}
legend {
  display: table;
  min-width: 0px;
  max-width: 70%;
  position: relative;
  margin: auto;
  padding: 5px 20px;
  font-size: 20px;
  text-align: center;
}
<fieldset>
  <legend>legend</legend>
  <div>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Beatae obcaecati dolore eligendi quaerat ad et possimus provident amet magni maiores, corporis, cupiditate omnis maxime dolorum saepe adipisci tempora perferendis optio.</div>
</fieldset>