stockfish - Why do Engines show a fraction for the Depth and Current Node values? - Chess Stack Exchange

Forgive me if this has been asked elsewhere, but I've both Googled and searched here at CSE and cannot find an answer. When I'm using an Engine for analysis (in this case, Stockfish 15), I've noticed

Stockfish does not understand this position. For humans this is very intuitive. : r/chess

winboard - StockFish under WIndows 8 doesn't work - Chess Stack Exchange

Do you get better at chess at a faster rate when you lose constantly against people/engines who are better than you, or when you play people/ engines who are much worse and you

winboard - StockFish under WIndows 8 doesn't work - Chess Stack Exchange

engines - How to download Stockfish and install it on the Fritz/ChessBase GUI? - Chess Stack Exchange

High-level explanation

Engine doesn't recognize best move - Chess Forums

engines - What does it mean when stockfish evaluates a move as an inaccuracy after previously thinking it was the best move? - Chess Stack Exchange

Why can Stockfish give different evaluations at the same depth? - Quora

NPS - What are the Nodes per Second in Chess Engine Analysis