at a snail's pace
US /æt ə ˈsneɪlz peɪs/
UK /æt ə ˈsneɪlz peɪs/

1.
a paso de tortuga, lentamente
extremely slowly
:
•
The traffic was moving at a snail's pace.
El tráfico avanzaba a paso de tortuga.
•
The construction work is progressing at a snail's pace.
La obra avanza a paso de tortuga.