Definition of "all-time"

And the Premier League's all-time top-goalscoring midfielder proved he has not lost the knack of being in the right place at the right time with a trio of clinical finishes.

2011 October 2, Jonathan Jurejko, “Bolton 1 - 5 Chelsea”, in BBC Sport‎

During the 1960s and 1970s, when both the quality of architecture and the appreciation of historic buildings reached an all-time low, British Railways was notorious for replacing good station buildings and canopies with little more than bus shelters, usually in conjunction with de-staffing.

2020 December 2, Anthony Lambert, “Reimagining Railway Stations”, in Rail, page 38