An aperçu and a coincidence

For years I have had a snobbish distaste for the word comradery. I assumed it was just an uncouth anglicization of cameraderie, with the first vowel 'corrected' to that of comrade.  I was about to inveigh about this assumed vulgarism, but thankfully did a spot of research before putting finger to keyboard.

It seems that both words exist.  Not all dictionaries recognize both, but the Collins does; and has corrected the mistake I deprecated some time ago (in this blog somewhere I can't trace) by making its word frequency feature more visible; it used to be right down at the bottom of the page; it is now more central, both vertically and horizontally.

 But the two words do not have the same popularity, although both first appeared late in the 19th century. A few years after a World War (14 years after WWI and 8 after WWII), comradery has a spike:

spikettes (spikelets? stilettos?)
 in 1932 and 1953

The Collins frequency graph isn't documented (as far as I can see), although perhaps (I hope) this is work-in-progress, as a part of the raising of the graph's profile; so I've no idea what a frequency of 0.1 means (which is what it says on mouseover as I regret they say); but I assume it's a good deal less than the 0.44 racked up by camaraderie at its height:

My "coincidence" also comes from this frequency graph, but it was instigated by a recent Radio 4 programme about The Dream of Gerontius.  It started (in the first 30 seconds) with a quotation from Elgar, presumably from a letter (the radio presenter just said "writing to his friend..."). He used the word illimitable  – not a word that springs regularly to the lips today. I expect Conrad used it, but I admit I wasn't sure when I heard the Elgar quotation whether he was coining it himself to do justice to the Malvern Hills (the context was "that illimitable horizon"). Collins shows this frequency graph:

The plateau throughout the second half of the 19th century and the first third of the 20th century happens to coincide neatly with Elgar's life (1857 – 1934). Of course I'm not suggesting that Elgar was the sole or main user of the word, but the coincidence is, I think, quite neat (and, coincidentally, it gives a particularly limpid example of the etymology of the word co-incidence).

Must go and do some prep for the forthcoming tour of my choir.

b
PS A couple of clues:

Hear me out:  it's WAGs' quarters (6)
Endless flak about spies – you've got a nerve!   (7)

Update 2016.09.09.14:50 – Time's up: HAREEM and SCIATIC