[{"ngram": "second millennium BC", "parent": "", "type": "NGRAM", "timeseries": [7.268949708816308e-08, 7.28536718952455e-08, 6.931718488090155e-08, 6.577987120083759e-08, 6.343466907310358e-08, 6.01110556885942e-08, 5.5121975809210455e-08, 5.276277040674618e-08, 4.79174531164972e-08, 4.7145757520183906e-08, 4.885377943456401e-08, 4.8826536211013915e-08, 5.0337994090503864e-08, 5.2258444936472056e-08, 5.307599185552395e-08, 5.2568104028491036e-08, 5.2284477192188206e-08, 5.157986630403381e-08, 4.9690049763739806e-08, 4.958125199294727e-08]}]