Most of the time, Toronto songwriter Charlotte Cornfield’s lyrics are so specifically mundane, they’re disarming. On 2016’s “Time Bomb,” she likened dating bad dudes to eating a “pre-packed sandwich,” its “expiry date on the horizon.” Her discography, which dates back to 2011, is crammed with unfrilly, relatable details that smack of being broke and twentysomething, like looking for a place to pee, or admitting her preferred coffee brand is still Chock full o’Nuts.