We look at the division of 86123615 by 70 
The aim is to understand the frequency of 70 in 86123615.

Advancing to step 1:
If we divide 8 by 70, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 70

Advancing to step 2:
The number 70 fits into 86 1 times, leaving a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 70 from 86 and we're left with 16.
Bring next digit (1) of the dividend behind the 16 and repeat the process: 161 / 70

Let's proceed to step 3:
161 divided by 70 is 2 with a remainder of 21.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtract 140 from 161 to get 21.
Append the next digit (2) from the dividend to 21 and continue with: 212 / 70

Going ahead to step 4:
70 goes into 212 3 times with a remainder of 2.
The next digit of our result is 3. 
Result so far: 123.0
Subtract 210 from 212 to get 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 70

On to step 5:
70 goes into 23 0 times with a remainder of 23.
The number 0 becomes the next digit in our result. 
Result so far: 1230.0
If we take 0 away from 23, we end up with 23.
Append the next digit (6) from the dividend to 23 and continue with: 236 / 70

Let's proceed to step 6:
236 divided by 70 is 3 with a remainder of 26.
The next digit of our result is 3. 
Result so far: 12303.0
Subtracting 210 from 236 leaves us with 26.
Take the next digit (1) from the dividend and append it to 26, then repeat: 261 / 70

Let's proceed to step 7:
70 goes into 261 3 times with a remainder of 51.
The next digit of our result is 3. 
Result so far: 123033.0
If we take 210 away from 261, we end up with 51.
Bring next digit (5) of the dividend behind the 51 and repeat the process: 515 / 70

Going ahead to step 8:
70 can be fit into 515 7 times, resulting in a remainder of 25.
Write down 7 as next digit of the result. 
Result so far: 1230337.0
The remainder is 25 after subtracting 490 from 515.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 9:
250 divided by 70 is 3 with a remainder of 40.
Put 3 as the next digit of the answer. 
Result so far: 1230337.3
Subtracting 210 from 250 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 10:
400 divided by 70 is 5 with a remainder of 50.
The next digit of our result is 5. 
Result so far: 1230337.35
The remainder is 50 after subtracting 350 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 11:
70 can be fit into 500 7 times, resulting in a remainder of 10.
Put 7 as the next digit of the answer. 
Result so far: 1230337.357
Subtracting 490 from 500 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
70 can be fit into 100 1 times, resulting in a remainder of 30.
The next digit of our result is 1. 
Result so far: 1230337.3571
Subtract 70 from 100 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 13:
When dividing 300 by 70, we get 4 with a remainder of 20.
Put 4 as the next digit of the answer. 
Result so far: 1230337.35714
Subtract 280 from 300 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 14:
70 goes into 200 2 times with a remainder of 60.
Put 2 as the next digit of the answer. 
Result so far: 1230337.357142
If we take 140 away from 200, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 15:
If we divide 600 by 70, we get 8 and a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 1230337.3571428
The remainder is 40 after subtracting 560 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 16:
When dividing 400 by 70, we get 5 with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 1230337.35714285
Subtracting 350 from 400 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final outcome is 1230337.35714285, with a leftover of 5e-08.