Is the wife entitled to demand that her husband visit her and stay with her just as he stays with his first wife, knowing that the husband has stopped visiting her due to his other wife's illness and the difficulty of being absent from his work?

If a wife travels for her own needs, even with her husband's permission, the preponderant opinion is that her right to division (of nights) and maintenance is forfeited. However, if she travels for a purpose related to her husband, her right to division is not forfeited, and he must make up for what she missed.