mint/api-v13/app/Models/WordStatistic.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class WordStatistic extends Model
{
    use HasFactory;

    protected $fillable = ['bookid', 'word', 'count', 'base', 'end1', 'end2', 'type', 'length'];
}