Tatlock, John S.  and Arthur G. Kenedy.  A concordance to the complete works of Geoffrey Chaucer, and to the Romaunt of the Rose.  Gloucester, Mass, 1963. (Reprinting the 1927 edition)

pp.812-3  
  Shod
That (dreme he barfoot, dreme he shod) ……….HF.1.98
And she was clothed and eke shod……………..RR.427
And shode he was with grete maistrie………….RR.824
And alle freres, shodde and bare………………..RR.7461
  Shoe
For though a wydwe hadde noght a sho………..A.Prol.253
Whan that his shoo full bitterly hym wrong…….D.WB.492
Of Venus workes worth his olde sho……………D.WB.708
But I woot best were wryngeth me my sho……..E.Mch.1553
  Shoes
Ful streite y-teyd, and shoes ful moyste and newe.A.Prol.457
Hir shoes were laced on hir legges hye…………A.Mil.3257
With Powles window corven on his shoos……...A.Mil.3318
And high shoos knopped with dagges…………..RR.7258
  Shoon
His shoon of cordewane…………………………B.Th.1922
With shoon decoped and with laas………………RR.843
Of shoon and botes new and faire……………….RR.2265
   
 

Piers Ploughman
14.330: Ne neither sherte ne shoon, save for shame one