i1. 'last hour
bTime = (new Date(moment().subtract(1, "hours").format('YYYY-MM-DD hh:mm:ss ')).getTime())/1000
2. Last Day
bTime = (new Date(moment().subtract(24, "hours").format('YYYY-MM-DD hh:mm:ss ')).getTime())/1000
3. the last week
bTime = (new Date(moment().subtract(168, "hours").format('YYYY-MM-DD hh:mm:ss ')).getTime())/1000