We look at the division of 85976066 by 373 
The aim is to understand the frequency of 373 in 85976066.

Advancing to step 1:
When dividing 8 by 373, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 373

Advancing to step 2:
373 can be fit into 85 0 times, resulting in a remainder of 85.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 85 to get 85.
Fetch the next digit (9) from the dividend, attach it to 85 and continue: 859 / 373

Step 3:
The number 373 fits into 859 2 times, leaving a remainder of 113.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 746 from 859 and we're left with 113.
Bring next digit (7) of the dividend behind the 113 and repeat the process: 1137 / 373

On to step 4:
373 goes into 1137 3 times with a remainder of 18.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
If we subtract 1119 from 1137, we get 18.
Grab the next digit (6) from the dividend, add it to 18, then carry on: 186 / 373

Let's proceed to step 5:
186 divided by 373 is 0 with a remainder of 186.
Record the quotient 0 as the next digit in the result. 
Result so far: 230.0
The remainder is 186 after subtracting 0 from 186.
Bring next digit (0) of the dividend behind the 186 and repeat the process: 1860 / 373

Going ahead to step 6:
373 goes into 1860 4 times with a remainder of 368.
Record the quotient 4 as the next digit in the result. 
Result so far: 2304.0
Subtracting 1492 from 1860 leaves us with 368.
Bring next digit (6) of the dividend behind the 368 and repeat the process: 3686 / 373

Going ahead to step 7:
If we divide 3686 by 373, we get 9 and a remainder of 329.
Record the quotient 9 as the next digit in the result. 
Result so far: 23049.0
Subtract 3357 from 3686 to get 329.
Take the next digit (6) from the dividend and append it to 329, then repeat: 3296 / 373

Advancing to step 8:
373 can be fit into 3296 8 times, resulting in a remainder of 312.
Use 8 as the next digit of our solution. 
Result so far: 230498.0
If we subtract 2984 from 3296, we get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Advancing to step 9:
If we divide 3120 by 373, we get 8 and a remainder of 136.
Record the quotient 8 as the next digit in the result. 
Result so far: 230498.8
If we subtract 2984 from 3120, we get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Step 10:
1360 divided by 373 is 3 with a remainder of 241.
The number 3 becomes the next digit in our result. 
Result so far: 230498.83
Subtract 1119 from 1360 to get 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

On to step 11:
If we divide 2410 by 373, we get 6 and a remainder of 172.
Write down 6 as next digit of the result. 
Result so far: 230498.836
If we subtract 2238 from 2410, we get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Step 12:
373 goes into 1720 4 times with a remainder of 228.
Write down 4 as next digit of the result. 
Result so far: 230498.8364
Subtract 1492 from 1720 to get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

On to step 13:
373 goes into 2280 6 times with a remainder of 42.
Use 6 as the next digit of our solution. 
Result so far: 230498.83646
The remainder is 42 after subtracting 2238 from 2280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 14:
420 divided by 373 is 1 with a remainder of 47.
The next digit of our result is 1. 
Result so far: 230498.836461
Subtract 373 from 420 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 15:
When dividing 470 by 373, we get 1 with a remainder of 97.
Record the quotient 1 as the next digit in the result. 
Result so far: 230498.8364611
If we take 373 away from 470, we end up with 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

The final outcome is 230498.8364611, with a leftover of 9.7e-07.