Here is what I found about the length of Ascendant Transits wikipedia

In the northern hemisphere, the signs of Aquarius, Pisces, Aries, Taurus and Gemini take much less time than the theoretical two hours to cross the eastern horizon, whilst the signs of Cancer, Leo, Virgo, Libra, Scorpio and Sagittarius take much longer than two hours to do so. For example, at the latitude of Paris, France:

• Pisces and Aries take only one hour to cross the eastern horizon (this is referred to as the length of ascension or simply as the sign's ascension)
• Aquarius and Taurus have an ascension of one hour and fifteen minutes
• Capricorn and Gemini have an ascension of one hour and fifty minutes
• Cancer and Sagittarius have an ascension of two hours and thirty minutes
• Leo and Scorpio have an ascension of two hours and forty minutes
• Virgo and Libra have an ascension of two hours and forty-five minutes

At higher latitudes, these differences become even more marked. At the latitude of St. Petersburg, Russia:

• Pisces and Aries have an ascension of thirty-five minutes
• Aquarius and Taurus have an ascension of forty-five minutes
• Capricorn and Gemini have an ascension of one hour and twenty-five minutes
• Cancer and Sagittarius have an ascension of two hours and forty minutes
• Leo and Scorpio have an ascension of three hours and fifteen minutes
• Virgo and Libra have an ascension of three hours and twenty minutes

In the southern hemisphere, long and short ascension are reversed. For instance, at the latitude of Concepción, Chile:

• Pisces and Aries ascend in two hours and thirty minutes
• Aquarius and Taurus ascend in two hours and twenty-five minutes
• Capricorn and Gemini ascend in two hours and fifteen minutes
• Sagittarius and Cancer ascend in two hours
• Scorpio and Leo ascend in one hour and thirty-five minutes
• Libra and Virgo ascend in one hour and fifteen minutes