The phrase "as indeed often" is correct and usable in written English.
It can be used to emphasize that something occurs frequently or regularly, often in a context where the speaker is affirming a previous statement.
Example: "The results of the study were surprising, as indeed often happens in such research."
Alternatives: "as is often the case" or "as frequently occurs".
Angell wrote, Sparky Anderson is a man of zeal, and his teams at their best give their opponents the impression that they are about to be buried in a game — as indeed they often are.
Indeed, when we think about what distinguishes Williams — his seriousness, intelligence and formal originality, his bracing skepticism about the claims of art matched to a tangible ambition to make art that matters — these ingredients seem as though they might result in indispensable poems, as indeed they often have.
At 2.598 660 Lucretius discusses the religious portrayal of Earth as divine mother, and concludes that if one is going to call sea 'Neptune', corn 'Ceres', wine 'Bacchus', etc.—as he himself indeed often enough does one might reasonably also personify the earth as their mother, hence as 'mother of the gods'.
But, as Shrimsley knows well, perception in politics is as important - indeed, often more important - than the reality.
The Oxford Handbook of the History of Communism embraces this new imperative to understand world communism as a polycentric (indeed, often terminally fractious) phenomenon.
For the Blair-Brown axis became as destructive as it had been – and indeed often remained despite the feuding – creative.
The behavior of a system described as an LTS is indeed often slightly hidden in its form.
Whether PFS can be accepted as a primary endpoint is, indeed, often considered to depend on its value as a surrogate for OS.
Despite the explosion of tree-like diagrams in the recent biological literature, evolution is indeed often perceived as a linear, progressive process rather than as a story of unceasing branching and diversification ultimately resulting in a tree.
Strictly speaking, such plants are chimeras as they are composed of two or more genetically distinct tissues and are indeed often referred to as "chimeras" [13].
