The book "How many times" is a book that asks questions related to the numbers, I crosscut the questions and after I engraved these questions in acrylic plates, to put them in shape like the book " Bamboo slats ". These questions ask the interviewee a reflection to answer. I am curious how people look at time and life after I had the idea of ​​a performance relating to the abacus and the questions. I put the abacus in an urban space, accompanied by comrades, including a girl who knows how to use it. a few spectators (about ten) intrigued participated in the performance and submitted to my personal questions related to time over a week for example: how much time do you sleep each night? Each answer was counted and the result took the form of statistical data: temporal data.