Hi Viktoria
I noticed that the top part of the 'dress' looked very similar of the same in both photos but as the images are not very clear, I wasn't certain. Also it clearly was the fashion, so if women could afford more than one, I wonder if they would look similar? I suppose they would need a minimum of two tops for when one was in the wash. Or perhaps they had an undergarment that was washed often, and only one top?
Less well-off women may have owned one best outfit or ensemble which they altered by adding or changing decoration or accessories.
I have 2 photos of a female ancestor also taken c1912. She was wearing a stiff-looking brand-new frock in one picture. She'd saved up money, ordered material and had the frock made. It would have been her best frock for several years, worn on Sundays and on special occasions. Her children remembered the frock more than 50 years later. She wore a skirt and a frilly blouse for the other photo. This photograph is less formal; she was kneeling by her toddler, something she wouldn't have been able to do in her stiff frock. The skirt & frilly blouse ensemble may have been her 2nd best outfit or her summer-best. The frills would have needed careful ironing so I doubt if the blouse would have been washed frequently. She probably changed into a more practical garment after the photographic session. She was wife of a tenant-farmer with a large family; there wasn't much spare money for "fripperies" or time for ironing frills.
Outer clothes would not have been washed often. Skirt and blouse ensemble was practical. Blouse could be washed more often and skirt brushed. Women wore several layers of under-garments, sometimes 2 petticoats.
The bride in your photos, being a maid, would have had low wages and little spare time. She might have been saving all her spare cash for her trousseau and her "bottom drawer". Her mistress or employer's daughter(s) may have contributed some "cast-offs" which she adapted. All girls were expected to be good at needlework. Bride's female relatives may have helped with sewing.