กลุ่มเป้าหมายคนดู 0.63 กี่ครั้ง?
How many times was the viewer target group 0.63?
df = pd.DataFrame(columns=['market_share__target_group_14_49_', 'viewers__in_millions_target_group_14_49_'])
df[df['viewers__in_millions_target_group_14_49_'] == '0.63']['market_share__target_group_14_49_'].count()