Is a pickled cucumber just a pickle?
Yes.  Basically, it is pickled in a brine, vinegar, or other solution and left to ferment.
How long does that process take?
Pickled cucumber
A pickled cucumber (commonly known as a pickle in the United States and Canada and a gherkin in Britain, Ireland, Australia, South Africa and New Zealand) is a cucumber that has been pickled in a brine, vinegar, or other solution and left to ferment for a period of time, by either immersing the cucumbers in an acidic solution or through souring by lacto-fermentation. Pickled cucumbers are often part of mixed pickles.
Historical origins.
It is often claimed that pickled cucumbers were first
Pickling
Pickling is the process of preserving or extending the lifespan of food by either anaerobic fermentation in brine or immersion in vinegar. In East Asia, vinaigrette (vegetable oil and vinegar) is also used as a pickling medium. The pickling procedure typically affects the food's texture, taste and flavor. The resulting food is called a "pickle", or, to prevent ambiguity, prefaced with "pickled". Foods that are pickled include vegetables, fruits, meats, fish, dairy and eggs.
A distinguishing