Aggregation of 2 non-salaried jobs to meet £18600

[seagul]

Good afternoon to all world members of forum,
Can the aggregation of 2 non-salaried jobs are allowed to meet the spouse visa threshold of £18600. For this purpose should the both jobs must be 6 months older or at least one job should be 6 months older?? I have read threshold guide but it does not guide about 2 jobs, so what's the answer of above query??