Как через animation сделать исчезающий/появляющийся текст?

.textspec {
    animation-name: tspec;
    animation-duration: 10s;
    animation-iteration-count: infinite;
    animation-timing-function: linear; /* step-start тоже */
}
 
@keyframes tspec {
    0% { visibility: hidden; }
    10% { visibility: visible; }
    90% { visibility: visible; }
    100% { visibility: hidden; }
}

@keyframes tspec {
    0%   { opacity: 0; }
    10%  { opacity: 1; }
    90%  { opacity: 1; }
    100% { opacity: 0; }
}

.widget {
    display: inline-block;
}
 
.tooltip {
    display: block;
    position: absolute;
    background: #333;
    color: white;
    padding: 20px;
}
 
.tooltip {
    margin-top: 20px;
    opacity: 0;
    -webkit-transition: opacity 0.3s, margin-top 0.3s;
    -moz-transition: opacity 0.3s, margin-top 0.3s;
    -o-transition: opacity 0.3s, margin-top 0.3s;
    transition: opacity 0.3s, margin-top 0.3s;
}
 
.widget:hover .tooltip {
    margin-top: 0;
    opacity: 1;
}

.tooltip {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0s linear 0.3s;
}
.widget:hover .tooltip {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}