When the ships hull was finished and closed - the ship was launched in order to make the dry dock free for the next order.
The masts, most deck fittings were fitted afterwards "swimming" - only the necessary things were installed (anchor (one) capstan, boat etc.)
Also the complete armament was supplied and installed later on - definitely usually not on the slipyard / drydock
The ships got the armament later on in the Zeughaus ( I do not know the correct english term - I think "arsenal", but) - and they used for lifting already there own masts and yrads together with the ship owned capstan (and rigging)
Some years ago the Danish Maritime Museum in Copenhagen closed, some models were transported to the new museum in Helsingor (see https://www.shipsofscale.com/sosforums/index.php?threads/maritime-museum-of-denmark-images-by-martin-hronsky.2622/ ), but most of the shipmodels are now part of the so...
shipsofscale.com
Here no difference was between frigates or ships of the line
some contemporary models showing the status for launching
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www.rmg.co.uk
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www.rmg.co.uk
all these models are not showing any gun or armament
Because of this usually there was often between the year of launching one or even more years until the ships were commissioned
PS: I think also, that they did not get the armament in the dockyard where the ship was build
The Royal Dockyard
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www.rmg.co.uk