…to stand up but, as a sign of his pleasure, would just raise his arms and who, on the couple of times a year when they went for a walk together on a Sunday or public holiday wrapped up tightly in his overcoat between Gregor and his mother, would always labour his way forward a little more slowly than them, who were already walking slowly for his sake; who would place his stick down carefully and, if he wanted to say something would invariably stop and gather his companions around him.
There are no more uses of "invariably" in the book.
Show samples from other sources
I tell myself to go to sleep early, but I invariably end up watching television late into the night.
You better tell her we’re starting earlier. She’s invariably late.