Yeah sorry should have explained myself better - the dates I was quoting are when they are available to do the job - for example Essex was commissioned on 31st Dec 42 but was not ready for combat (trials / working up / fixing issues / training crew etc / actually reaching Pearl Harbour etc) till May 43. The only other Fleet CV to commission and reach actual service that year was Yorktown CV 10 which commissioned on 15th April 43 but did not reach the combat area until 24th July - undertaking further training for a month out of Pearl and starting actual combat ops in late Aug -
Edit: due to a tragic google fu failure I Missed Bunker Hill CV 17- Combat ops in Nov 43 and
Lexington CV16 Combat Ops in Sept 43 - so that's 4 Fleet CVs in late 43 -

- they were joined by the Light Carrier Independence (who arrived in pearl in late July 43) for the same combat op. Her sister Princetown arrived at Pearl in early Aug 43 and started combat ops late that month.
Belleau Wood arrived Late July and again was conducting ops in late Aug.
Cowpens arrived late Sept 43 - combat ops in Oct 43.
Monterey - started combat ops in Nov 43. Langley is next but she does not enter combat until early 44.
The Essex and Independence Pez dispenser does not actually start to tip the balance much before the 2nd half of 43 and in this scenario effectively until early 44.
In the face of the POD I suspect that some time could be shaved off these times but they were already very very impressively short - Hull laid down - commissioning times OTL.
Still that is 4 Essex class by Xmas 43 and a similar number of Light carriers - but that's still a year - 18 months where KB holds the advantage in this scenario.