you may be wrong . the exact number of card in dl above 10 000++ already. you may counted card in box but dont forget selection, structure, legendary duelist, drop card, ranked duel card, new year campaign card, events card. you not counted them yet so you wrong about 5200 cards
if u want the exacte numbers, here all playable cards in this game.
total = 6682.
-extra monster = 566
131 xyz / 213 fusion / 222 synchro
-monster = 3920
3236 effect m / 619 normal monster
-spell = 1233
-traps = 963